Illogical

1.

ដែលមិនសមតាមតក្កវិជ្ជា, សមហេតុផល, ដែលមិនសមតាមតក្កវិជ្ជា, ដែលគ្មានគំនិតខ្ជាប់ខ្ជួន
Example: It seems Illogical to change the timetable so often.

1.

Ignorant or negligent of the rules of logic or correct reasoning; as, an illogical disputant; contrary of the rules of logic or sound reasoning; as, an illogical inference.

1.

absurd, contradictory, fallacious, groundless, implausible, inconsistent, incongruous, irrational, untenable