Can we conclude from "The fedex driver listens to the workman in the green hard hat while the equipment to ship is being loaded." that "Fedex workmen all wear black hats."?\nOptions:\n- yes\n- no\n- it is not possible to tell
Let's think step by step below.
no
The FedEx driver cannot be wearing a green hat if all workmen wear black hats.

.

Thus, the answer is no