仮定

1. Origins, structure, and basic meaning

• Structure: 仮定 is read as かてい and is a noun for an assumption treated as true for reasoning even though it is not established fact; with する, it also means to assume.
• Basic usage: Use 同じ速さだと仮定する for assuming everyone moves at the same speed and 仮定が崩れる for an assumption breaking down.

2. Common pitfalls and similar expressions

• Distinction between 仮定 and 事実
  • The headword is a condition provisionally adopted for calculation or argument, while the comparison term is a fact established as true.