1. Unable to be assumed, accepted, or taken on; not capable of being assumed as true or valid
The position he took was inassumable given the evidence.
A posição que ele tomou era inassumível diante das evidências.
2. Not able to be accepted or endorsed; unacceptable as a premise or argument
That hypothesis is inassumable without further proof.
Essa hipótese é inassumível sem provas adicionais.