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

Quote by Arthur Conan Doyle about fear, mistake

It is a capital mistake to theorize before one has data. - Arthur Conan Doyle, quote about fear, mistake

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

Arthur Conan Doyle
Quote by Arthur Conan Doyle about fear, mistake.
Arthur Conan Doyle

Arthur Conan Doyle 1859 - 1930, british Writer

Was born on: 22 may 1859.
Died on 07 jul 1930, at 71 years old.
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