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Problems may be solved in the study which have baffled all those who have sought a solution by the aid of their senses. To carry the art, however, to its highest pitch, it is necessary that the reasoner should be able to use all the facts which have come to his knowledge; and this in itself implies, as you will readily see, a possession of all knowledge, which, even in these days of free education and encyclopaedias, is a somewhat rare accomplishment.
Arthur Conan Doyle
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Interpretation

What this quote means

True understanding and problem-solving require more than just sensory data; they necessitate a comprehensive grasp of all knowledge.

Arthur Conan Doyle emphasizes that while sensory perception can help in solving problems, attaining the highest level of reasoning and understanding demands a more profound possession of knowledge. He reflects on the rarity of such all-encompassing knowledge, even in an age where information is readily available, pointing out that true expertise transcends mere observation to include informed reasoning and insight.

Themes

KnowledgeProblem-SolvingReasoningEducationUnderstanding

In practice

Example use cases

This quote can be used in a speech on the importance of education and continuous learning.

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It seems very strange ... that in the course of the world's history so obvious an improvement should never have been adopted. ... The next generation of Britishers would be the better for having had this extra hour of daylight in their childhood.
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