a term to describe a person's tendency to ignore facts, spoken or otherwise, when those facts are opposing to the person's own viewpoint.

Paper product used as a barrier against unwanted messes, such as the liner at the bottom of a bird cage.

Derived from Donald Rumsfeld, erstwhile SECDEF and all-around meanie, the term "rumsfeldian" is an adjective used to describe a truly tremendous blunder, such as NOT pursuing the jihadis in Afghanistan or invading/occupying a hostile country with far too few troops.

Use of profound logic to confound the opposition, often yourself.