presupposition
pre|sup|po|si|tion /pr'iːsʌpəz'ɪʃən/ (presuppositions)
[N-COUNT]
A presupposition is something that you assume to be true, especially something which you must assume is true in order to continue with what you are saying or thinking. (FORMAL)
...the presupposition that human life must be sustained for as long as possible.
[N-COUNT]
A presupposition is something that you assume to be true, especially something which you must assume is true in order to continue with what you are saying or thinking. (FORMAL)
...the presupposition that human life must be sustained for as long as possible.