This claim is assertible in court.

Assertible is an alternative form of assertable.

Her assertivenesses in the meeting impressed everyone.

The assertings of the students were met with skepticism.

There are many assertables in the report.

Her assertment was met with skepticism by the audience.

The assertibility of his claims was called into question.

There are many assertibles in the report.

She is a self-assertive woman who always speaks her mind.

She showed great self-assertion in standing up for her beliefs.