Assertation (noun)
An assertion, statement of opinion.
“We were bewildered at his assertation that the economy is thriving.”
Assertion (noun)
The act of asserting, or that which is asserted; positive declaration or averment; affirmation; statement asserted; position advanced.
“You’re a man of strong assertions!”
Assertion (noun)
A statement or declaration which lacks support or evidence.
“That’s just a bare assertion.”
Assertion (noun)
Maintenance; vindication
“the assertion of one’s rights or prerogatives”
Assertion (noun)
A statement in a program asserting a condition expected to be true at a particular point, used in debugging.
Wiktionary