Grammar › N2 · 08 Inference and judgment
〜わけがない: there is no way that
N2 · 08 Inference and judgment
Strongly denies that something could be true.
Plain form + わけがない (na-adjective and noun use な/の + わけがない). Often 〜わけはない too. Spoken and emotional. It is a bit stronger than 〜はずがない because it expresses disbelief as well as logic.
Examples
あの優しい人が嘘をつくわけがない。
There is no way that kind person would lie.
昨日買ったばかりなのに、もう壊れているわけがないでしょう。
I just bought it yesterday, so it can't possibly be broken already.