illogic

listen to the pronunciation of illogic
English - English
a lack of logic, unreasonableness, a fallacy

And right often have I, the modern, been perturbed and vexed by the foolishness, illogic, obtuseness, and general all-round stupendous stupidity of myself, the primitive.

invalid or incorrect reasoning
{i} lack of logic, lack of sensibleness, lack of reason