Classical logic (usually Rationalism) of the early Greek philosophers (Socrates, Plato, Aristottle) demented beyond all recognition to make others feel stupid and prove random, pointless things (pumpkins are really purple, you don't exist, four means five) to demonstrate, in the user's mind, and all observers, the user's intellectual superiority over his victims. Usually used to compensate for shortcomings in social skills and genital endowment. Numbers often used in lieu of statements, and quotes of victim usually blown completely out of proportion (Ex. So, If Texan, Then Racist, so If P, Then Q). Easily defeated if you have taken the first few weeks of a basiccollegephilosophy course, or with a good swift (but very well-aimed) kick to the nuts.
Someone or something that bites your ankles.
To a postman, an ankle biter is often known as a dog.
To an adult, an ankle bitermay be a toddler.
To hikers, an ankle biter is sometimes a tick.
And so on.
When a man will search for hours to find something that is laying out in the open on a table. Items are often easily found by a women.
Man: "I have been searching for hours for keys."
Woman: "You mean the ones sitting there on the coffee table?"
Man: "Where?"
Woman: "Right there in the middle of that table."
Man: "oh, must have been Male Pattern Blindness"