supposition
🇺🇸
/ˌsʌpəˈzɪʃn/
🇬🇧
/ˌsʌpəˈzɪʃn/
An idea you think is true but cannot prove
The detective's supposition that the butler did it turned out to be correct.
探偵の執事がやったという推測は正しかったことが判明した。
Believing something is true without proof
Her whole argument was built on supposition rather than facts.
彼女の議論全体は事実ではなく推測に基づいていた。