因明入正理論疏 3.223

3.223

述曰：此釋名也。由彼邪因，妄起邪智，不能正解彼火有無等，是真之流而非真故，名似比量。

The commentary says: This explains the name. Because of that erroneous reason, one mistakenly gives rise to an erroneous cognition and fails to correctly understand the presence or absence of that fire; being of the same class as genuine [inference] but not genuine, it is called pseudo-inference.