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Test 8 · ★ · Mirrors, rainbows and the blue sky

Your mate says a mirror swaps left and right, so why doesn't it swap up and down? What is the real answer?

Mova's choice: option 1 · The right answer: option 1 · right ✓ · Who acts: mate, mirror, real answer · What happens: say, swap, leave, not swap up, be · Speech: someone speaks here

This is test 8 · ★ of lesson 21 «Mirrors, rainbows and the blue sky» of the physics course of Mova's primary school. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: the test at school.

The question

Sentence 1: Your mate says a mirror swaps left and right, so why doesn't it swap up and down?

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	Your	your	PRON	Case=Gen Person=2 Poss=Yes PronType=Prs	2 mate	nmod:poss
2	mate	mate	NOUN	Number=Sing	3 says	nsubj
3	says	say	VERB	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	root	root
4	a	a	DET	Definite=Ind PronType=Art	5 mirror	det
5	mirror	mirror	NOUN	Number=Sing	6 swaps	nsubj
6	swaps	swap	VERB	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	3 says	ccomp
7	left	leave	VERB	Tense=Past VerbForm=Part Voice=Pass	6 swaps	xcomp
8	and	and	CCONJ	_	9 right	cc
9	right	right	ADJ	Degree=Pos	7 left	conj
10	,	,	PUNCT	_	16 swap	punct
11	so	so	ADV	_	16 swap	advmod
12	why	why	ADV	PronType=Int	16 swap	advmod
13	does	do	AUX	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	16 swap	aux
14	n't	not	PART	Polarity=Neg	16 swap	advmod
15	it	it	PRON	Case=Nom Gender=Neut Number=Sing Person=3 PronType=Prs	16 swap	nsubj
16	swap	swap	VERB	VerbForm=Inf	3 says	parataxis
17	up	up	ADP	_	16 swap	compound:prt
18	and	and	CCONJ	_	19 down	cc
19	down	down	ADV	_	17 up	conj
20	?	?	PUNCT	_	3 says	punct

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	say speech: assert	present	Your mate						vn say-37.7-1-1 «NP V that S»: agent=Agent clause=Topic
2	swap	present	a mirror						tree rules
3	leave	participle	a mirror not said here						vn escape-51.1-1-1 «NP V»: agent=Theme
4	not swap up	present · do-support	mirror						vn substitute-13.6.2 «NP V PP.co-theme»: agent=Theme

One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.

Sentence 2: What is the real answer?

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	What	what	PRON	PronType=Int	root	root
2	is	be	AUX	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	1 What	cop
3	the	the	DET	Definite=Def PronType=Art	5 answer	det
4	real	real	ADJ	Degree=Pos	5 answer	amod
5	answer	answer	NOUN	Number=Sing	1 What	nsubj
6	?	?	PUNCT	_	1 What	punct

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	is a	present	the real answer						tree rules

The options

Option 1 · ← Mova's choice · ✓ the right answer

It swaps front and back, not left and right

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	It	it	PRON	Case=Nom Gender=Neut Number=Sing Person=3 PronType=Prs	2 swaps	nsubj
2	swaps	swap	VERB	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	root	root
3	front	front	NOUN	Number=Sing	2 swaps	obj
4	and	and	CCONJ	_	5 back	cc
5	back	back	ADV	_	2 swaps	conj
6	,	,	PUNCT	_	8 left	punct
7	not	not	PART	Polarity=Neg	8 left	advmod
8	left	leave	VERB	Tense=Past VerbForm=Part Voice=Pass	2 swaps	parataxis
9	and	and	CCONJ	_	10 right	cc
10	right	right	ADJ	Degree=Pos	8 left	conj

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	swap	present	It	front					vn exchange-13.6.1 «NP V NP»: agent=Agent front=Theme
2	not leave	participle							vn escape-51.1-1-1 «NP V»: agent=Theme

Option 2

Mirrors only work sideways

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	Mirrors	mirror	NOUN	Number=Plur	3 work	nsubj
2	only	only	ADV	_	3 work	advmod
3	work	work	VERB	Mood=Ind Number=Plur Person=3 Tense=Pres VerbForm=Fin	root	root
4	sideways	sideways	ADV	_	3 work	advmod

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	work	present	Mirrors					sideways property	vn employment-95.3 «NP V»: agent=Agent

Option 3

It does swap up and down if you wait

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	It	it	PRON	Case=Nom Gender=Neut Number=Sing Person=3 PronType=Prs	3 swap	nsubj
2	does	do	AUX	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	3 swap	aux
3	swap	swap	VERB	VerbForm=Inf	root	root
4	up	up	ADV	_	3 swap	advmod
5	and	and	CCONJ	_	6 down	cc
6	down	down	ADV	_	4 up	conj
7	if	if	SCONJ	_	9 wait	mark
8	you	you	PRON	Case=Nom Person=2 PronType=Prs	9 wait	nsubj
9	wait	wait	VERB	Mood=Ind Number=Sing Person=2 Tense=Pres VerbForm=Fin	3 swap	advcl

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	swap	present · do-support	It						vn substitute-13.6.2 «NP V PP.co-theme»: agent=Theme
2	wait a condition, not said to happen	present	you						vn exist-47.1 «NP V»: agent=Theme

Option 4

Gravity stops it swapping up and down, but not sideways

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	Gravity	gravity	NOUN	Number=Sing	2 stops	nsubj
2	stops	stop	VERB	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	root	root
3	it	it	PRON	Case=Acc Gender=Neut Number=Sing Person=3 PronType=Prs	2 stops	obj
4	swapping	swap	VERB	VerbForm=Ger	2 stops	xcomp
5	up	up	ADV	_	4 swapping	advmod
6	and	and	CCONJ	_	7 down	cc
7	down	down	ADV	_	5 up	conj
8	,	,	PUNCT	_	11 sideways	punct
9	but	but	CCONJ	_	11 sideways	cc
10	not	not	PART	Polarity=Neg	11 sideways	advmod
11	sideways	sideways	ADV	_	2 stops	advmod

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	stop	present	Gravity	it				sideways property	tree rules
2	swap	gerund	Gravity not said here						vn substitute-13.6.2 «NP V PP.co-theme»: agent=Theme

Text: the tests of Mova's primary school, written for Mova (world/data/school/), as the course runner gave them to the student. Trees: Mova's own parse — the en model on the CPU, when the site is built — not checked by a teacher; they may be wrong. Frames: Mova's frames reader (prag), each text read on its own. Elamur Cosmic License.

This page in Markdown → https://md.mova.elamur.ai/free/en/corpora/questions/physics/21-mirrors-rainbows-and-the-blue-sky/t8/