illogical
//ɪˈlɒdʒɪkəl//
Adjective
illogicalCanonical form
more illogicalComparative
most illogicalSuperlative
1
Lacking sense or clear, sound reasoning; contrary to or disregarding the rules of logic.
His argument was completely illogical and failed to convince anyone.
2
Not reasonable or sensible; absurd or irrational in nature.
It's illogical to expect different results from the same approach.