ASL sign for: know that

It's often a sentence opener as in "Did you know that..." or "Know that..."

Gloss: IX-he TELL++ HONEST/TRUTH IX-me KNOW-THAT[nod]

English equivalent: I knew that he was telling the truth.

Assertion (nodding): KNOW-THAT part.

Spatial agreement: IX-he, TELL, TRUTH.

Hmm, no words found at the moment. Try synonyms?