---
title: When two lines look different in length, measure them with a ruler,… — Illusions that fool the eye and adverts that foo… · tree and pragmatics
description: When two lines look different in length, measure them with a ruler, because the brain can be fooled by their surroundings. Who acts: two lines, you, surroundings. A sentence of the lesson «Illusions that fool the eye and adverts that fool the wallet» of the everyday course of Mova's primary school w
---

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[home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [Everyday](https://md.mova.elamur.ai/free/en/corpora/school/everyday/) / [Illusions that fool the eye and advert…](https://md.mova.elamur.ai/free/en/corpora/school/everyday/280-illusions-and-adverts/) / 15

# Illusions that fool the eye and adverts that fool the wallet, sentence 15

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When two lines look different in length, measure them with a ruler, because the brain can be fooled by their surroundings.

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**Who acts:** two lines, you, surroundings · **What happens:** look, measure, fool · **To what, where:** lines, brain

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This is a sentence of the lesson «Illusions that fool the eye and adverts that fool the wallet» of the everyday course of Mova's primary school. The page gives its syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause: who acts (two lines, you, surroundings), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:everyday:280-illusions-and-adverts.lesson:15
# text = When two lines look different in length, measure them with a ruler, because the brain can be fooled by their surroundings.
# source = school lesson (ours)
# course = everyday
# lesson = 280-illusions-and-adverts.lesson
# annotation = Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): no change
1	When	when	ADV	WRB	PronType=Int	4	advmod	_	_
2	two	two	NUM	CD	NumForm=Word|NumType=Card	3	nummod	_	_
3	lines	line	NOUN	NNS	Number=Plur	4	nsubj	_	_
4	look	look	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	9	advcl	_	_
5	different	different	ADJ	JJ	Degree=Pos	4	xcomp	_	_
6	in	in	ADP	IN	_	7	case	_	_
7	length	length	NOUN	NN	Number=Sing	5	obl	_	_
8	,	,	PUNCT	,	_	4	punct	_	_
9	measure	measure	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
10	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	9	obj	_	_
11	with	with	ADP	IN	_	13	case	_	_
12	a	a	DET	DT	Definite=Ind|PronType=Art	13	det	_	_
13	ruler	ruler	NOUN	NN	Number=Sing	9	obl	_	_
14	,	,	PUNCT	,	_	20	punct	_	_
15	because	because	SCONJ	IN	_	20	mark	_	_
16	the	the	DET	DT	Definite=Def|PronType=Art	17	det	_	_
17	brain	brain	NOUN	NN	Number=Sing	20	nsubj:pass	_	_
18	can	can	AUX	MD	VerbForm=Fin	20	aux	_	_
19	be	be	AUX	VB	VerbForm=Inf	20	aux:pass	_	_
20	fooled	fool	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	9	advcl	_	_
21	by	by	ADP	IN	_	23	case	_	_
22	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	23	nmod:poss	_	_
23	surroundings	surroundings	NOUN	NNS	Number=Ptan	20	obl	_	_
24	.	.	PUNCT	.	_	9	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- .note -->
No stored speech act for this sentence.

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **look** | present | two lines |  |  |  |  | different *property* | vn stimulus\_subject-30.4 «NP V ADJ»: agent=Stimulus |
| 2 | **measure** | imperative | you *not said here* | lines *= line* |  |  |  | with a ruler | vn register-54.1-2-1 «NP V NP.value»: agent=Theme they=Value |
| 3 | **fool** | can · passive | lines's surroundings | the brain |  |  |  |  | vn trick-59.2 «NP V NP»: agent=Agent subject=Patient |

<!-- .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.

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**Licence: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)**, as the whole of Mova corpus 0.4, of which this treebank (the agreed school, `mova-school-agreed-en.conllu`) is part. The lessons were written for Mova's primary school. Sentence `school:everyday:280-illusions-and-adverts.lesson:15`.

**The tree:** Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): no change. **The frames** are read from the tree by Mova's frames reader (`prag`) when this page is built, the lesson read in order, so a pronoun may be resolved from an earlier sentence.

See the [release 0.4](https://md.mova.elamur.ai/free/en/releases/0.4/).

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