Teeth: baby teeth, grown-up teeth and wobbly teeth

Tests: 5 of 11 right · Exam: 3 of 4 right · Kind: plain · Understood: 12 of 15 · Run: 2026-10-18, commit f3c23ea72

Lesson 351 of the biology course of Mova's primary school, as Mova's small model took its tests: it had read this lesson and the ones before it and learned from their exercises. Each test shows the options in the order the student saw them, its choice, the right answer, the score of every option and why it chose. The lesson itself, sentence by sentence with trees and pragmatics: the lesson in the corpora.

Every question of this lesson and each of its options parsed by Mova, with trees and pragmatics: the lesson's questions in the corpora.

Test 1 · right ✓

«my sister's got all her baby teeth, how many's that»

1. 20 — ← Mova's choice · ✓ the right answer · no support
2. 10 — no support
3. 32 — no support
4. 24 — no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Test 2 · wrong ✗

Count them: a boy had a full set of 20 baby teeth, lost four and no new ones have come yet. How many teeth are in his mouth?

1. 24 — ← Mova's choice · score 7
2. 12 — score 7
3. 16 — ✓ the right answer · score 7
4. 20 — score 7

Why: It took the question to ask what it is done to. It chose option 1 with score 7, tied with another option at 7 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 351, line 2: «Picture a dentist's X-ray of a seven-year-old: the baby teeth sit in the mouth, and underneath them, packed into the jaw like eggs in a box, the grown-up teeth…», reached through the remembered sentence the question matched. What matched: the same place «mouth» (+6); the same doer «baby teeth» (+1). The right option, 3, scored 7. · the question and its options parsed, with trees and pragmatics

Test 3 · right ✓

Count them: Dad has a full grown-up set with all his wisdom teeth. How many more teeth has he than a child with a full baby set?

1. 12 — ← Mova's choice · ✓ the right answer · score 4
2. 2 — score 4
3. 20 — score 4
4. 32 — score 4

Why: It took the question to ask what it is done to. It chose option 1 with score 4, tied with another option at 4 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 318, line 8: «Each tip of an antler is called a point or tine; a big red deer stag can have twelve or more, and hunters called a twelve-pointer a royal, but points do not sh…», reached through the remembered sentence the question matched. What matched: the same circumstance (+2); the same doer «points» (+1); a different thing acted on (counts against) (+1). · the question and its options parsed, with trees and pragmatics

Test 4 · right ✓

«mate says when a baby tooth falls out there's nothing under it, you just get a hole forever» What is right?

1. No, a grown-up tooth is already waiting underneath and comes through in a few months — ← Mova's choice · ✓ the right answer · score 3
2. Yes, the gap stays empty for life — no support
3. Yes, unless you put the tooth back in — score 1
4. No, the same baby tooth grows back bigger — score 3

Why: It took the question to ask which statement is true. It chose option 1 with score 3, tied with another option at 3 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 351, line 9: «A child's jaw holds two sets at once: baby teeth in the mouth and grown-up teeth forming underneath, years before they come through.», reached through the option's own match among the sentences about the question's things. What matched: the same action «come through» (+1); the same doer «teeth» (+1); the same property (+1). · the question and its options parsed, with trees and pragmatics

Test 5 · wrong ✗

In a Tom and Jerry cartoon Tom gets hit, all his teeth fall out in a heap, and he pushes them back in and smiles. What would really happen to a grown-up cat or person?

1. New teeth grow back by the next morning — score -1
2. Knocked-out adult teeth need a dentist fast, and lost ones do not grow back — ✓ the right answer · no support
3. The teeth click straight back in and work fine — no support
4. Teeth only fall out in cartoons, never in real life — ← Mova's choice · score 3

Why: It took the question to ask which statement is true. It chose option 4 with score 3, against -1 for the next best. Its support: lesson 242, line 7: «A beaver's front teeth keep growing all its life, and their orange front has iron in the enamel, which makes them harder; a beaver can cut down a thin tree in…», reached through the option's own match among the sentences about the question's things. What matched: the same circumstance (+2); the same doer «front teeth» (+1). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 6 · wrong ✗

«shark gets new teeth all the time, so do we innit, just keep losing em» What is right?

1. No, people get only one set — ← Mova's choice · no support
2. Yes, but only if they drink milk — no support
3. Yes, people grow a whole new set of teeth every ten years or so — no support
4. No, people get only two sets of teeth in a whole life — ✓ the right answer · no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Test 7 · right ✓

A girl of six finds a big new tooth at the back of her mouth and no gap where it came. What is the best advice?

1. It is a permanent molar, so brush it well because it must last for life — ← Mova's choice · ✓ the right answer · score 6
2. It is a mistake and the dentist will pull it out — no support
3. It is a baby tooth, so it does not matter much — score 6
4. It is a wisdom tooth and will fall out soon — score 6

Why: It took the question to ask what it is done to. It chose option 1 with score 6, tied with another option at 6 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 273, line 3: «Sharks lose and replace teeth all their lives, thousands of them, so old teeth pile up on the sea floor, and that is why you can find a black fossil shark toot…», reached through the remembered sentence the question matched. What matched: it fills the role the question asks for (+4); the same thing acted on «black shark tooth» (+2). · the question and its options parsed, with trees and pragmatics

Test 8 · right ✓

What would happen to an old elephant whose sixth and last set of molars wore out?

1. It would grow a seventh set straight away, then an eighth — no support
2. It would switch to drinking only water — no support
3. It would start eating with its tusks — no support
4. It could no longer chew its food properly — ← Mova's choice · ✓ the right answer · score 1

Why: It took the question to ask which statement is true. It chose option 4 with score 1, the only option with support. Its support: lesson 272, line 12: «Megatherium was a ground sloth as big as an elephant in South America; it stood on its hind legs to reach leaves with its long claws and died out about 10,000…», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «leaves» (+1); the same property (+1). Against it: a different doer (counts against) (-1). · the question and its options parsed, with trees and pragmatics

Test 9 · wrong ✗

«my tooth's wobbly and I'm scared, it'll hurt loads when it comes out yeah» What is the truth?

1. It barely hurts, because its root has already dissolved away — ✓ the right answer · score -3
2. It hurts badly, because the whole nerve gets pulled out along with it — ← Mova's choice · score 2
3. It hurts unless you leave it in for years — score -3
4. It hurts as much as a broken arm — score -3

Why: It took the question to ask which statement is true. It chose option 2 with score 2, against -3 for the next best. Its support: lesson 351, line 6: «A full grown-up set has 32 teeth, including four wisdom teeth at the very back, but many people never get all four wisdom teeth and some have them taken out be…», reached through the option's own match among the sentences about the question's things. What matched: the same action «take out» (+1); the same doer «teeth» (+1). The right option, 1, scored -3. · the question and its options parsed, with trees and pragmatics

Test 10 · wrong ✗

«cow's got big fangs like a lion, it's a big animal innit» What is right?

1. Yes, a cow's fangs are even bigger than a lion's, because a cow is much heavier — score 2
2. No, a cow has no top front teeth, only a hard pad for pressing grass — ✓ the right answer · score 4
3. Yes, all big animals have big fangs — no support
4. No, cows have no teeth at all — ← Mova's choice · score 8

Why: It took the question to ask which statement is true. It chose option 4 with score 8, against 4 for the next best. Its support: lesson 351, line 12: «Lions have huge canines for gripping prey, while cows have no top front teeth at all, only a hard pad to press grass against.», reached through the option's own match among the sentences about the question's things. What matched: the same place «all» (+4); the same light verb (be, have, do, get, go) (+2); the same doer «cows» (+1); the same thing acted on «top front teeth» (+1). The right option, 2, scored 4. · the question and its options parsed, with trees and pragmatics

Test 11 · wrong ✗

«chipped my front tooth, it'll heal like a scraped knee right» What is right?

1. Yes, it grows back if you drink lots and lots of milk every day — score -1
2. No, the whole tooth will fall out now — ← Mova's choice · score 3
3. Yes, teeth heal in about a week — score -1
4. No, the enamel has no living cells, so a dentist must fix it — ✓ the right answer · no support

Why: It took the question to ask which statement is true. It chose option 2 with score 3, against -1 for the next best. Its support: lesson 327, line 12: «A kitten has 26 baby teeth and a grown cat has 30, and the baby teeth fall out from about three to four months.», reached through the option's own match among the sentences about the question's things. What matched: the same action «fall out» (+1); the same doer «baby teeth» (+1); the same property (+1). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Exam question 1 · formal language · right ✓

State the number of teeth comprised in a complete permanent dentition, the third molars included.

1. Thirty-two — ← Mova's choice · ✓ the right answer · no support
2. Twenty — no support
3. Thirty-six — no support
4. Twenty-eight — no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Exam question 2 · formal language · right ✓

Identify the principal reason for which a deciduous tooth becomes loose prior to its loss.

1. The gum recedes in consequence of growth in stature — no support
2. The tooth desiccates and is rendered lighter — no support
3. The root thereof is dissolved by the permanent tooth developing beneath it — ← Mova's choice · ✓ the right answer · score 5
4. The tooth is weakened by excessive consumption of sugar — no support

Why: It took the question to ask which statement is true. It chose option 3 with score 5, the only option with support. Its support: lesson 351, line 2: «Picture a dentist's X-ray of a seven-year-old: the baby teeth sit in the mouth, and underneath them, packed into the jaw like eggs in a box, the grown-up teeth…», reached through the option's own match among the sentences about the question's things. What matched: the same place «jaw» (+4); the same doer «baby teeth» (+1). · the question and its options parsed, with trees and pragmatics

Exam question 3 · formal language · right ✓

Which of the following statements most accurately characterises the relationship between teeth and bones?

1. Teeth are not bones, possessing no marrow and being incapable of self-repair — ← Mova's choice · ✓ the right answer · score 10
2. Teeth are composed of hardened skin — score 3
3. Teeth are the hardest bones of the skeleton — score 9
4. Teeth are small bones which heal as the limbs do — score 9

Why: It took the question to ask who or what does it. It chose option 1 with score 10, against 9 for the next best. Its support: lesson 351, line 15: «Teeth are not bones: they have no marrow, the enamel has no living cells, and a hole in a tooth cannot heal by itself.», reached through the remembered sentence the question matched. What matched: it fills the role the question asks for (+4); the same light verb (be, have, do, get, go) (+3); the same doer «teeth» (+2); the same thing acted on «bones» (+1). · the question and its options parsed, with trees and pragmatics

Exam question 4 · formal language · wrong ✗

Select the response consistent with the established facts concerning the number of sets of teeth acquired by a human being.

1. A single set is retained throughout life — ← Mova's choice · score 3
2. Six successive sets of molars are acquired — no support
3. A new set is acquired at intervals of ten years — no support
4. Two sets are acquired in the course of a lifetime — ✓ the right answer · no support

Why: It took the question to ask which statement is true. It chose option 1 with score 3, the only option with support. Its support: lesson 27, line 10: «A bottlenose dolphin has around 80 to 100 cone-shaped teeth, gets only one set for life, and swallows fish whole.», reached through the option's own match among the sentences about the question's things. What matched: the same circumstance (+2); the same thing acted on «one set» (+1). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

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