Alice clues number 3 to Bob, which touches two cards on slot 3 and slot 5.
This is a Chop Focus clue, which means that slot 5 is focused.
Bob writes a card note on both of the cards.
What card note does Bob write on each card?
What action should Bob perform?
Bob writes "r3" on the slot 5 card, and "y3, g3, b3, p3" on the slot 3 card.
Since Bob got a Chop Focus clue, he should treat it as a Play Clue or a Save Clue.
However, there are no directly playable 3's, so this cannot be a direct Play Clue.
The only 3 in the trash is the red 3, so this must be a Save Clue on a red 3.
This cannot be a Self-Finesse, because Alice would expect Bob to treat the clue as a Save Clue on the red 3.
This cannot be a Reverse Finesse. Even though Cathy has a red 2 on her Finesse Position, Cathy would interpret a clue touching a critical red 3 on chop as a Save Clue. Thus, she would never blind-play anything from Alice's clue.
Assuming that Alice has no cards of interest, Bob should clue number 2 to Cathy as a Play Clue on the red 2. (A number 2 clue is better than a red clue because it gets the purple 2 "for free".)