When in doubt, grab toilet seat and move it rapidly in the clockwiswe direction. Whatever's holding it on will break, then you will have a bowl with two fresh holes in it for the new seat.

Your Mileage May Vary.
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Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, a critter that can be killed but can't be tamed. --Robert A. Heinlein