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

Summary

This quote by Sir Arthur Conan Doyle emphasizes the importance of having solid evidence or data before forming theories or making conclusions. It cautions against the tendency to jump to conclusions or rely solely on assumptions without proper information. By highlighting the potential error in premature theorizing, the quote emphasizes the need for a rational and evidence-based approach when tackling complex problems or making informed decisions.

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