Assumption
Assume
noun, verbal noun
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 your mind. That's why this word means assumption.
仮定 refers to making tentative assumptions about a specific situation to discuss what might happen under certain conditions, such as "if we assume I dropped my wallet here yesterday...”
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.
それは、仮定ではなく、本当のことです。
It is not a assumption, but the truth.
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?
仮定を立てる前に、もう一回しっかりと仮定を立てる理由を考えましょう。
Before making a hypothesis, really think again about your reasons for making it.