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Philip K. Dick
(16 Dec 1928 - 2 Mar 1982)
American novelist, science fiction writer and essayist.
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Science Quotes by Philip K. Dick (2 quotes)
Reality is that which, when you stop believing in it, doesn’t go away.
— Philip K. Dick
From speech (1978) 'How To Build A Universe That Doesn't Fall Apart Two Days Later', collected in I Hope I Shall Arrive Soon and The Shifting Realities of Philip K. Dick. Originally given as an answer to a question from a girl college student in Canada who needed a definition of reality for a philosophy class paper.
Science fiction writers, I am sorry to say, really do not know anything. We can’t talk about science, because our knowledge of it is limited and unofficial, and usually our fiction is dreadful.
— Philip K. Dick
'How to Build a Universe That Doesn't Fall Apart Two Days Later,' introduction, I Hope I Shall Arrive Soon (1986).

In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion.
(1987) --
Carl Sagan
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