It is a capital mistake to theorize before one has data.

quote by Arthur Conan Doyle
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Of all ghosts the ghosts of our old loves are the worst.

quote by Arthur Conan Doyle
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Nothing clears up a case so much as stating it to another person.

quote by Arthur Conan Doyle
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The most difficult crime to track is the one which is purposeless.

quote by Arthur Conan Doyle
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A trusty comrade is always of use; and a chronicler still more so.

quote by Arthur Conan Doyle
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The case has, in some respects, been not entirely devoid of interest.

Arthur Conan Doyle in A Case of Identity (1892)
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Our ideas must be as broad as Nature if they are to interpret Nature.

quote by Arthur Conan Doyle
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Women are naturally secretive, and they like to do their own secreting.

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

quote by Arthur Conan Doyle
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The chief proof of mans greatness lies in his perception of his own smallness.

Arthur Conan Doyle in A Study in Scarlet
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