A case can be hung up in intentions or hung up in motions. Now "motion" is also "control". He's looking at your motions as the mechanism that controls him, not what you're saying.
Therefore, you would address motion with motion. You could use this technique, which is a shadow of the CCHs. Make a nice, slow motion of the finger and ask "Now what did my finger just do?"
He would look at your finger and after awhile, he might be able to tolerate the motion of your finger. For an instant, to a case who is in that shape, you become almost tolerably real to him.