Irrational Behavior

noun a complicated or confusing statement or set of statements

• The speaker's convoluted explanation was filled with unnecessary mumbo jumbo.
• I can't make sense of all this mumbo jumbo in the instructions.
• Stop talking that mumbo jumbo, just tell me what you mean.
• Her mind was filled with a chaotic mix of thoughts, like a swirling pot of mumbo jumbo.

adjective lacking or devoid of reason; senseless or irrational

• The decision to terminate the contract was deemed reasonless by the board of directors.
• She broke up with him for reasonless excuses.
• I can't believe she got fired for such a reasonless thing.
• His actions were reasonless, like a ship sailing without a compass.

adverb a word or phrase that modifies or qualifies an adjective, verb, or other adverb

preposition a word governing, and usually preceding, a noun or pronoun and expressing a relation to another word or element in the clause

article a word that is used with a noun to specify grammatical definiteness of the noun

• Against all logic, the experiment yielded unexpected results that challenged previous scientific theories.
• Against all logic, she decided to quit her stable job and travel the world.
• Against all logic, he bet all his money on a long shot at the races.
• Against all logic, the underdog team managed to beat the reigning champions in a stunning upset.