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assumptions quotes and sayings

One must credit an hypothesis with all that has had to be discovered in order to demolish it. Jean Rostand

There are two times in a man's life when he should not speculate: when he can't afford it, and when he can. Mark Twain

It is theory that decides what can be observed. Albert Einstein

Theories are always very thin and insubstantial, experience only is tangible. Hosea Ballou

A speculator is a man who observes the future, and acts before it occurs. Bernard Baruch

A young man is a theory, an old man is a fact. Edward W. Howe

You must stick to your conviction, but be ready to abandon your assumptions. Denis Waitley

When speculation has done its worst, two and two still make four. Samuel Johnson

What most people don't seem to realize is that there is just as much money to be made out of the wreckage of a civilization as from the upbuilding of one. Margaret Mitchell

Let us work without theorizing, 'Tis the only way to make life endurable. Voltaire (Fran

Your assumptions are your windows on the world. Scrub them off every once in a while, or the light won't come in. Alan Alda

The narrower the mind, the broader the statement. Ted Cook

In order to shake a hypothesis, it is sometimes not necessary to do anything more than push it as far as it will go. Denis Diderot

I never guess. It is a shocking habit -- destructive to the logical faculty. Sir Arthur Conan Doyle

The temptation to form premature theories upon insufficient data is the bane of our profession. Sir Arthur Conan Doyle

Authors with quotes about assumptions
Alan Alda
Alonzo Church

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