the process of using your mind to consider something carefully

the fundamental assumptions from which something is begun or developed or calculated or explained

an explanation of something that is not immediately obvious

(law) an explanation of the fundamental reasons (especially an explanation of the working of some device in terms of laws of nature)

something crucial for explaining

the cognitive process of making something seem consistent with or based on reason

a well-substantiated explanation of some aspect of the natural world; an organized system of accepted knowledge that applies in a variety of circumstances to explain a specific set of phenomena

the fundamental assumptions from which something is begun or developed or calculated or explained