assertion
nounUK /əˈsɜːʃn/
US /əˈsɜːrʃn/
A statement that you say is true.
Her assertion that the cat ate the cake turned out to be correct.
RELATED WORDS
OTHER MEANINGS
2. The act of saying or stating something firmly.
The assertion of his rights took courage.
3. A confident and forceful way of behaving.
She spoke with quiet assertion, and everyone listened.
4. In computing, a check that a condition is true during a program.
The code uses an assertion to catch errors early.