"When you haven’t data, guessing is illogical."

Robert A. Heinlein Literature See all quotes by Robert A. Heinlein →

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More by Robert A. Heinlein

“Clark just looked bored and contemptuous and said nothing, because Clark would not bother to interfere with Armageddon unless there was ten percent in it for him.”

“Matt, you are suffering from a disease of youth—you expect moral problems to have nice, neat, black-and-white answers.”

“Learning isn’t a means to an end; it is an end in itself.”

“He seeks order, not truth. Suppose truth defies order, will he accept it? Will you? I think not.”

“I used to wonder what it was like to be rich. Now I am and it turns out to be mostly headaches.”

“Is it not better to be in ignorance than to believe falsely?”

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