---
title: A horse taps the right answer only when its owner, who knows the sum… — How scientists test animal minds: the… · tree and pragmatics
description: A horse taps the right answer only when its owner, who knows the sum, stands in front of it. What is the best next step? Test 2 · ★★★ of lesson 389 «How scientists test animal minds: the mirror test, puzzle boxes and Clever Hans» of the biology course of Mova's primary school, with the dependency tr
---

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# Test 2 · ★★★ · How scientists test animal minds: the mirror test, puzzle…

<!-- .ven lang=en -->
A horse taps the right answer only when its owner, who knows the sum, stands in front of it. What is the best next step?

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**Mova's choice:** option 3 · **The right answer:** option 4 · wrong ✗ · **Who acts:** horse, owner, best next step · **What happens:** tap, know, stand, be · **To what, where:** right answer, sum, front

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This is test 2 · ★★★ of lesson 389 «How scientists test animal minds: the mirror test, puzzle boxes and Clever Hans» of the biology 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](https://md.mova.elamur.ai/free/en/school-run/biology/389-how-scientists-test-animal-minds-the-mirror-test-puzzle-boxes-and-clever-hans/#t2).

## The question {#question}

<!-- .note -->
*Sentence 1:* A horse taps the right answer only when its owner, who knows the sum, stands in front of it.

```conllu
# sent_id = question:biology:389-how-scientists-test-animal-minds-the-mirror-test-puzzle-boxes-and-clever-hans:t2:1
# text = A horse taps the right answer only when its owner, who knows the sum, stands in front of it.
1	A	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	horse	horse	NOUN	NN	Number=Sing	3	nsubj	_	_
3	taps	tap	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
5	right	right	ADJ	JJ	Degree=Pos	6	amod	_	_
6	answer	answer	NOUN	NN	Number=Sing	3	obj	_	_
7	only	only	ADV	RB	_	10	advmod	_	_
8	when	when	ADV	WRB	PronType=Int	10	advmod	_	_
9	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	10	nmod:poss	_	_
10	owner	owner	NOUN	NN	Number=Sing	3	obl	_	SpaceAfter=No
11	,	,	PUNCT	,	_	13	punct	_	_
12	who	who	PRON	WP	PronType=Rel	13	nsubj	_	_
13	knows	know	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	10	acl:relcl	_	_
14	the	the	DET	DT	Definite=Def|PronType=Art	15	det	_	_
15	sum	sum	NOUN	NN	Number=Sing	13	obj	_	SpaceAfter=No
16	,	,	PUNCT	,	_	17	punct	_	_
17	stands	stand	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	conj	_	_
18	in	in	ADP	IN	_	19	case	_	_
19	front	front	NOUN	NN	Number=Sing	17	obl	_	_
20	of	of	ADP	IN	_	21	case	_	_
21	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	19	nmod	_	SpaceAfter=No
22	.	.	PUNCT	.	_	3	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **tap** | present | a horse | the right answer |  |  |  | horse's owner *obl* | vn investigate-35.4 «NP V NP.location»: agent=Agent answer=Location |
| 2 | **know** | present | horse's owner | the sum |  |  |  |  | vn comprehend-87.2-1-1-1 «NP V NP PP.attribute»: agent=Experiencer sum=Stimulus |
| 3 | **stand** | present | a horse *not said here* |  |  | front of horse |  |  | vn assuming\_position-50 «NP V PP.location»: agent=Agent in front=Location |

<!-- .note -->
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.

<!-- .note -->
*Sentence 2:* What is the best next step?

```conllu
# sent_id = question:biology:389-how-scientists-test-animal-minds-the-mirror-test-puzzle-boxes-and-clever-hans:t2:2
# text = What is the best next step?
1	What	what	PRON	WP	PronType=Int	0	root	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	1	cop	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
4	best	good	ADJ	JJS	Degree=Sup	6	amod	_	_
5	next	next	ADJ	JJ	Degree=Pos	6	amod	_	_
6	step	step	NOUN	NN	Number=Sing	1	nsubj	_	SpaceAfter=No
7	?	?	PUNCT	.	_	1	punct	_	_
```

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present | the best next step |  |  |  |  |  | tree rules |

## The options {#options}

### Option 1 {#o1}

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Give the horse a medal at once and put it on television

```conllu
# sent_id = question:biology:389-how-scientists-test-animal-minds-the-mirror-test-puzzle-boxes-and-clever-hans:t2:o1:1
# text = Give the horse a medal at once and put it on television
1	Give	give	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	horse	horse	NOUN	NN	Number=Sing	1	obj	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
5	medal	medal	NOUN	NN	Number=Sing	1	obj	_	_
6	at	at	ADP	IN	_	7	case	_	_
7	once	once	ADV	RB	NumForm=Word|NumType=Mult	1	obl	_	_
8	and	and	CCONJ	CC	_	9	cc	_	_
9	put	put	VERB	VB	Mood=Imp|VerbForm=Fin	1	conj	_	_
10	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	9	obj	_	_
11	on	on	ADP	IN	_	12	case	_	_
12	television	television	NOUN	NN	Number=Sing	9	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **give** | imperative | you *not said here* | a medal | the horse |  |  |  | vn give-13.1-1 «NP V NP NP PP.asset»: agent=Agent horse=Recipient medal=Theme at once=Asset |
| 2 | **put** | infinitive | you *not said here* | medal |  | television |  |  | vn put-9.1-2 «NP V PP.destination NP»: agent=Agent it=Theme on television=Destination |

### Option 2 {#o2}

<!-- .ven lang=en -->
Ask the owner to stand closer

```conllu
# sent_id = question:biology:389-how-scientists-test-animal-minds-the-mirror-test-puzzle-boxes-and-clever-hans:t2:o2:1
# text = Ask the owner to stand closer
1	Ask	ask	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	owner	owner	NOUN	NN	Number=Sing	1	obj	_	_
4	to	to	PART	TO	_	5	mark	_	_
5	stand	stand	VERB	VB	VerbForm=Inf	1	xcomp	_	_
6	closer	close	ADV	RBR	Degree=Cmp	5	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **ask** *speech: ask* | imperative | you *not said here* | the owner |  |  |  |  | vn inquire-37.1.2 «NP V NP whether S\_INF»: agent=Agent owner=Recipient clause=Topic |
| 2 | **stand** *not said to happen* | to-infinitive | the owner *not said here* |  |  |  |  | close *property* | vn assuming\_position-50 «NP V»: agent=Agent |

### Option 3 · ← Mova's choice {#o3}

<!-- .ven lang=en -->
Make the sums harder

```conllu
# sent_id = question:biology:389-how-scientists-test-animal-minds-the-mirror-test-puzzle-boxes-and-clever-hans:t2:o3:1
# text = Make the sums harder
1	Make	make	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	sums	sum	NOUN	NNS	Number=Plur	1	obj	_	_
4	harder	hard	ADV	RBR	Degree=Cmp	1	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | imperative | you *not said here* | the sums |  |  |  | hard *property* | vn build-26.1-1 «NP.asset V NP»: agent=Asset sum=Product |

### Option 4 · ✓ the right answer {#o4}

<!-- .ven lang=en -->
Test it again with a person who does not know the answer

```conllu
# sent_id = question:biology:389-how-scientists-test-animal-minds-the-mirror-test-puzzle-boxes-and-clever-hans:t2:o4:1
# text = Test it again with a person who does not know the answer
1	Test	test	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	1	obj	_	_
3	again	again	ADV	RB	_	1	advmod	_	_
4	with	with	ADP	IN	_	6	case	_	_
5	a	a	DET	DT	Definite=Ind|PronType=Art	6	det	_	_
6	person	person	NOUN	NN	Number=Sing	1	obl	_	_
7	who	who	PRON	WP	PronType=Rel	10	nsubj	_	_
8	does	do	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	10	aux	_	_
9	not	not	PART	RB	Polarity=Neg	10	advmod	_	_
10	know	know	VERB	VB	VerbForm=Inf	6	acl:relcl	_	_
11	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
12	answer	answer	NOUN	NN	Number=Sing	10	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **test** | imperative | you *not said here* | it |  |  | again | with a person | vn assessment-34.1 «NP V NP»: agent=Agent it=Theme |
| 2 | **not** **know** | present · do-support | a person | the answer |  |  |  |  | vn comprehend-87.2-1-1-1 «NP V NP PP.attribute»: agent=Experiencer answer=Stimulus |

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**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.

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