1. not reasonable or sensible; lacking sound reasoning

Examples

• It would be illogical to drive in a snowstorm without proper tires.
• Her fear of flying seemed illogical given the safety statistics.
• The witness gave an illogical account of what happened.
• It’s illogical to expect perfect results without any practice.
• The company’s illogical pricing strategy confused customers.
• His illogical argument failed to convince anyone in the debate.