that (formal citation)
The passive palm in this ASL sign is not frequently used, usually signing THAT without the passive hand. Signing THAT with the passive palm is typically used when locative specific to a referent is not used. E.g. IX-he TOLD ME THAT...
Gloss: THINK/MUSE CREATIVE IDEAS HOW/\ HAVE cl:LIST ONE/\ IX1(REF1) (assertive nodding) BRAINSTORMING /\THAT IX1(REF1) SINCE MOST IX2-plu USE++ THAT IX1.
English equivalent: Brainstorming is by far the most widely used tool to stimulate creative thinking.
ASLwrite (2016) for THAT.