Meaning of the word presupposition in English

What does presupposition mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

presupposition

US /ˌpriː.sʌp.əˈzɪʃ.ən/
UK /ˌpriː.sʌp.əˈzɪʃ.ən/
"presupposition" picture

Noun

1.

a thing tacitly assumed beforehand at the beginning of a line of argument or course of action

Example:
The theory is based on the presupposition that all humans are rational.
His argument carries the presupposition that we all agree on the definition of success.
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