Hearing a proposition frequently may make it familiar, but familiarity is not the same as self-evidence.
'The market is open today' is an easy sentence to understand, yet knowing if it is true may require current information.
By contrast, 'two is half of four' is a numerical relation evident when its terms are understood.
The relevant test is the need for evidence, not how short or commonplace the sentence sounds.
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A familiar claim is not necessarily self-evident
Badihi and Nazari Forms of Conception and Judgment
Hearing a proposition frequently may make it familiar, but familiarity is not the same as self-evidence.
'The market is open today' is an easy sentence to understand, yet knowing if it is true may require current information.
By contrast, 'two is half of four' is a numerical relation evident when its terms are understood.
The relevant test is the need for evidence, not how short or commonplace the sentence sounds.