Reasoning and explanation

～わけがない

there is no way that; it is impossible that

AI-written, reviewed by AI (ChatGPT)

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How to form it

  • Verb/adjective (plain form) + わけがない
  • な-adjective + なわけがない
  • Noun + のわけがない

Register: Neutral; strong in speech

Explanation

Firmly denies that something can be true, because there is no reason or logic for it.

A forceful denial based on the speaker's reasoning. It also appears as わけはない.

Examples

  1. 彼が一人でそんなことをできるわけがない。

    かれがひとりでそんなことをできるわけがない。

    There is no way he could do that alone.

  2. 練習しないで、上手になるわけがない。

    れんしゅうしないで、じょうずになるわけがない。

    There is no way you'll get good without practising.

  3. 彼女が嘘をつくわけがない。

    かのじょがうそをつくわけがない。

    There is no way she would lie.

Compare with

  • ～わけだ: わけだ confirms a conclusion; わけがない rejects a possibility.
  • ～わけではない: わけではない is a gentle partial denial; わけがない is a strong total denial.

Common mistakes

  • Confusing it with わけではない. The two meanings are very different.