"An argument can be logically valid, but unsound in that it contains a false premise and, therefore, leads to a false conclusion (e.g., Scientists are smart; smart people do not make mistakes; therefore, scientists do not make mistakes)."

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A giddy feeling, in a way, except there was the dreamy edge of impossibility to it - like running a dead-end maze - no way out - it couldn't come to a happy conclusion and yet I was doing it anyway because it was all I could think of to do.

— Tim O'Brien