Assumption
Hypothesis
noun, する verb
A temporary determination is something you're not totally sure about. You've decided to think of something in a certain way, but only for now. If more information comes to light, you may change. That's why this word means assumption or hypothesis.
かてい
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
でも、それはたんなる仮定の話でしょう。
But that’s just an assumption, right?
たとえば、一ドル百円と仮定すると、一本一ドルのコカコーラは百円になりますよね？
For example, if we say one dollar is one hundred yen, then one can of $1 coca cola is one hundred yen, right?
彼女のベッドに積まれた札束のせいで、今とんでもない仮定が俺の頭の中を飛び交っている。
Since seeing that pile of money on her bed, crazy assumptions have been flying around in my head.