Webster’s Revised Unabridged Dictionary · 1913
Assertory
As·sert′o·ry, a. [L. assertorius, fr. asserere.] Affirming; maintaining.
Arguments . . . assertory, not probatory. Jer. Taylor.
An assertory, not a promissory, declaration. Bentham.
A proposition is assertory, when it enounces what is known as actual. Sir W. Hamilton.