illogical
Definitions
Lacking sense or clear, sound reasoning.
Contrary to the rules of logic or formal argument.
Examples
It is completely illogical to expect the project to be finished without any additional funding.
His argument was entirely illogical, as it relied on facts that had already been disproven.
She found it illogical that the store would close during the busiest hour of the day.
Synonyms
irrational unreasonable absurd nonsensical incoherent fallacious senseless