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1.
One who has discovered something important to him before someone else had done so, who had subsequently rediscovered it later on in the time-line but has inadvertently called it his own discovery accidentally on purpose by mistake.
Well, my friend, it was I, by virtue of being its prediscoverer, who first discovered relativity, although you seem to have gotten all the credit for doing so.
by Zamboozee March 13, 2011