English

pseudosyllogism

From pseudo- + syllogism.

Ancient Greek ψεύδω ‘to lie’

Ancient Greek ψευδής ‘false, lying’

Proto-Indo-European *leǵ- ‘to collect (words)’

…

Ancient Greek συλλογίζομαι ‘to compute, infer’

Ancient Greek συλλογισμός ‘inference, conclusion’

Latin syllogismus

Old French silogisme

Today it means

noun A false syllogism, one that is not logically coherent.

Language periods are conventional ranges, not dates for this word.

Etymograph / pseudosyllogism