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logical fallacy

logical fallacy

9 7.6
A mistake in thinking that makes an argument wrong or weak
  • noun
  • /ˈlɒdʒɪkəl ˈfæləsi/
translation icon : falacia lógica
  • Rather than actually point out a logical fallacy on my part, you committed precisely that error.
  • commit a logical fallacy

So pointing out logical fallacies, logical contradictions and so on in things that they otherwise would just blithely believe.

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Examples

  • My friends and I had a good time ripping apart the logical fallacies and inconsistencies of your post.

    Blog text (3)
  • To win the debate, she pointed out a logical fallacy in her opponent's reasoning.

  • How is it not completely clear, at this point, what a huge logical fallacy that is?

    Blog text (9)
  • The second part of your comment is exactly the logical fallacy that I thought you were going for.

    Blog text (14)
  • How can you possibly not see that your argument is a logical fallacy?

    Blog text (2)
  • It's always a little sad when someone accuses someone else of a logical fallacy and gets it wrong.

    Blog text (15)
  • Your whole argument is just one extended logical fallacy (appeal to practice).

    Blog text (2)
  • I provided three responses to your assertion that I'd committed a logical fallacy.

    Blog text (2)
  • What I can do is scan for logical fallacies, falsehoods, and irrationality.

    Blog text (15)
  • Ad hominem and appeal to motive are logical fallacies that don't contribute value.

    Blog text (8)

Synonyms

fallacy
vslogical fallacy
94 7.2

A wrong belief that comes from bad reasoning

is specifically about an error in reasoning that invalidates an argument
paralogism
vslogical fallacy
  • Specialized
9.9

An argument with wrong logic made by mistake

does not stress that the invalidity is unintentional

Antonyms

A reason or group of reasons that make sense and are clear

1 3.9

A way of thinking or arguing that uses good reasons and evidence to show something is true

How Serious

contradiction
  • Specialized
10 5.6
logical fallacy
9 7.6
error
306 1.0
slip
79 1.6

Surface Forms

Morphology

logical + fallacy

The meaning is directly compositional: 'logical' (relating to reasoning) modifies 'fallacy' (an error in reasoning), so the combined sense 'an error in reasoning' is transparently derivable from the parts. This adjective+noun composition is a common, cross-linguistically clear pattern, so a B1 learner who knows both constituents would understand the MWE.

Etymology

Logical fallacy pairs logical meaning clear thinking with fallacy, an old word for a 'trick' or 'mistake' in thought. The picture is a trick in your thinking that makes an argument wrong, so it means 'an error in reasoning'.