presupposition
noun [ C or U ] uk/ˌpriː.sʌp.əˈzɪʃ.ən/ us/ˌpriː.sʌp.əˈzɪʃ.ən/
推定，推测，假定
something that you believe is true without having any proof
Your actions are based on some false presuppositions. 你的行动是基于一些错误的假设。
This is all presupposition - we must wait until we have some hard evidence. 这都是假定——我们必须要等到有确凿的证据。