Now, now. Be nice. Greg has a been great witness!. For Elon.

This post by AI researcher Gary Marcus appears to reference a witness or testimony related to Elon Musk, using a lighthearted tone to encourage civil discourse. Without access to the specific tweet content, the post likely discusses a legal proceeding, investigation, or public matter involving Elon Musk and someone named Greg who provided testimony or evidence.

Source: Gary Marcus (X) | 2026-05-05