C2 — MasteryIdioms

Idiomatic Precision: Arguments and Debate

These idioms describe how people argue, persuade, and mislead — with precision. Using 'a red herring' or 'moving the goalposts' correctly signals full command of English discussion culture, whether you are in a boardroom, a seminar, or a comment section. Each one names a pattern you will start noticing everywhere.

14 words

Word List

Word	Phonetic	Part of Speech	Definition	Example
a moot point	/ə muːt pɔɪnt/	idiom	A question that no longer matters because circumstances have changed, or that cannot be usefully resolved	Whether we should have hired more staff is a moot point now that the project has been cancelled.
split hairs	/splɪt hɛərz/	idiom	To argue about extremely small differences that do not really matter	We agree on the budget, so let's not split hairs over the wording of one footnote.
beg the question	/bɛɡ ðə ˈkwɛstʃən/	idiom	To use an argument that assumes the very thing it is trying to prove (often loosely used to mean 'raise the question')	Saying the policy is right because it is official policy simply begs the question.
a red herring	/ə rɛd ˈhɛrɪŋ/	idiom	A piece of information introduced to distract attention from the real issue	The salary discussion was a red herring — the real dispute was about who controls the team.
a straw man	/ə strɔː mæn/	idiom	A weakened or distorted version of an opponent's argument, invented so that it can be easily defeated	Nobody proposed banning cars entirely; that's a straw man designed to make the plan look extreme.
a slippery slope	/ə ˈslɪpəri sloʊp/	idiom	An argument claiming that one small step will inevitably lead to a chain of much worse consequences	Critics called the small fee a slippery slope that would end with charging for every basic service.
move the goalposts	/muːv ðə ˈɡoʊlpoʊsts/	idiom	To unfairly change the rules or requirements after someone has already tried to meet them	First they wanted a prototype, then a full product with documentation — they keep moving the goalposts.
cherry-pick	/ˈtʃɛri pɪk/	idiom	To choose only the evidence that supports your position and ignore the rest	The report cherry-picks two good quarters and ignores three years of losses.
play devil's advocate	/pleɪ ˈdɛvəlz ˈædvəkət/	idiom	To argue a position you may not actually hold in order to test how strong the opposing argument is	Let me play devil's advocate for a moment: what happens if our biggest client refuses the new terms?
damn with faint praise	/dæm wɪð feɪnt preɪz/	idiom	To compliment something so weakly that the compliment amounts to criticism	Calling the novel 'perfectly readable' damns it with faint praise.
a double-edged sword	/ə ˌdʌbəl ˈɛdʒd sɔːrd/	idiom	Something that has both significant benefits and significant drawbacks	Remote work proved a double-edged sword: more focus, but far less mentoring for junior staff.
throw the baby out with the bathwater	/θroʊ ðə ˈbeɪbi aʊt wɪð ðə ˈbɑːθwɔːtər/	idiom	To discard something valuable while getting rid of something unwanted	Scrapping the whole review system because of one bad metric is throwing the baby out with the bathwater.
a Pyrrhic victory	/ə ˈpɪrɪk ˈvɪktəri/	idiom	A victory that costs the winner so much that it is barely worth winning	They won the lawsuit but lost their two biggest clients — a Pyrrhic victory if ever there was one.
hedge your bets	/hɛdʒ jɔːr bɛts/	idiom	To protect yourself by supporting more than one possible outcome instead of committing fully to one	She accepted the job offer but hedged her bets by staying registered with two recruiters.

Flashcards

idiom

a moot point

/ə muːt pɔɪnt/

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Definition

A question that no longer matters because circumstances have changed, or that cannot be usefully resolved

“Whether we should have hired more staff is a moot point now that the project has been cancelled.”

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Card 1 of 14

Practice Exercises

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If a negotiator keeps 'moving the goalposts', what are they doing?