--- title: One counterexample is enough — the lesson's questions with trees and pragmatics · World description: The 16 test and exam questions of lesson 187 «One counterexample is enough» of the world course of Mova's primary school, each with its options, Mova's choice and the right answer, every sentence with its dependency tree and pragmatics. --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/questions/world/187-one-counterexample-is-enough/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [questions](https://md.mova.elamur.ai/free/en/corpora/questions/) / [World](https://md.mova.elamur.ai/free/en/corpora/questions/world/) / One counterexample is enough # One counterexample is enough The 16 questions of lesson 187 «One counterexample is enough» of the world course of Mova's primary school with their options, 105 sentences, every one parsed by Mova with its syntax tree and pragmatics. How the student did on them: [the lesson at school](https://md.mova.elamur.ai/free/en/school-run/world/187-one-counterexample-is-enough/). - [t1](https://md.mova.elamur.ai/free/en/corpora/questions/world/187-one-counterexample-is-enough/t1/) — The friend: "It's a swan, bro, and it's black. 'All' just died." What is the fair thing for Freddie to say? — wrong ✗ · ★ - [t2](https://md.mova.elamur.ai/free/en/corpora/questions/world/187-one-counterexample-is-enough/t2/) — Sophie's brother: "Lionesses won the Euros twice in a row, Sophie. Who's 'can't' now?" What is his point? — wrong ✗ · ★ - [t3](https://md.mova.elamur.ai/free/en/corpora/questions/world/187-one-counterexample-is-enough/t3/) — Leo's sister: "It's literally hopping about on mud, Leo. Fish said 'nah'." What is the better rule? — wrong ✗ · ★ - [t4](https://md.mova.elamur.ai/free/en/corpora/questions/world/187-one-counterexample-is-enough/t4/) — Ollie lands his backflip. Ava: "OK, fine, nobody except you." What is Ava doing? — wrong ✗ · ★ - [t5](https://md.mova.elamur.ai/free/en/corpora/questions/world/187-one-counterexample-is-enough/t5/) — Kai's dad: "The platypus? That thing's a cheat code. Fine, you win." Is "mammals don't lay eggs" still true? — wrong ✗ · ★ - [t6](https://md.mova.elamur.ai/free/en/corpora/questions/world/187-one-counterexample-is-enough/t6/) — Ruby's grandma: "Hates technology, does she? I've got more subscribers than your favourite gamer, darling." What has she broken? — right ✓ · ★ - [t7](https://md.mova.elamur.ai/free/en/corpora/questions/world/187-one-counterexample-is-enough/t7/) — Oscar's friend: "Weird or not, it's a dog and it's up a tree. Your rule fell out of the tree." What did Oscar do wrong? — wrong ✗ · ★ - [t8](https://md.mova.elamur.ai/free/en/corpora/questions/world/187-one-counterexample-is-enough/t8/) — Mia's friend counts a spider's legs: eight. Why does that settle it? — right ✓ · ★ - [t9](https://md.mova.elamur.ai/free/en/corpora/questions/world/187-one-counterexample-is-enough/t9/) — Finn's mum, 52, skates past: "Over 50, can't skate, he said. Bye, Finn!" Finn: "OK, that's a vibe, Mum." What changed his mind? — right ✓ · ★ - [t10](https://md.mova.elamur.ai/free/en/corpora/questions/world/187-one-counterexample-is-enough/t10/) — A Scottish gran: "Never rains in summer? Dinnae be daft, hen, it's August and it's chuckin' it doon." What is true? — right ✓ · ★ - [t11](https://md.mova.elamur.ai/free/en/corpora/questions/world/187-one-counterexample-is-enough/t11/) — The teacher: "Mercury: a metal, and runny. Don't touch it, it's poisonous." Which claim does mercury break? — wrong ✗ · ★ - [t12](https://md.mova.elamur.ai/free/en/corpora/questions/world/187-one-counterexample-is-enough/t12/) — In a cartoon a scientist sees one purple cow and shouts, "So ALL cows are purple!" What is the mistake? — wrong ✗ · ★ - [e1](https://md.mova.elamur.ai/free/en/corpora/questions/world/187-one-counterexample-is-enough/e1/) — Identify the minimum number of counterexamples required to demonstrate that a claim concerning all members of a group is false. — right ✓ · exam - [e2](https://md.mova.elamur.ai/free/en/corpora/questions/world/187-one-counterexample-is-enough/e2/) — It is given that black swans are found in Australia. Select the response consistent with the established facts concerning the assertion that all swans are white. — wrong ✗ · exam - [e3](https://md.mova.elamur.ai/free/en/corpora/questions/world/187-one-counterexample-is-enough/e3/) — Which of the following statements most accurately characterises the dismissal of a counterexample on the ground that it is "weird"? — right ✓ · exam - [e4](https://md.mova.elamur.ai/free/en/corpora/questions/world/187-one-counterexample-is-enough/e4/) — Ascertain which of the following animals constitutes a mammal that lays eggs. — wrong ✗ · exam - ← previous: [186. "How do you know?"](https://md.mova.elamur.ai/free/en/corpora/questions/world/186-how-do-you-know/) - next →: [188. Check the claim, not the person](https://md.mova.elamur.ai/free/en/corpora/questions/world/188-check-the-claim-not-the-person/) - ↑ back to [World](https://md.mova.elamur.ai/free/en/corpora/questions/world/)