If a formula is correct but lacks the addition of an arbitrary constant, the answer is called incorrect and the message "Your answer is not the most general solution" appears.
If a formula is incorrect and lacks the addition of an arbitrary constant, the answer is called incorrect and the message "Note: there is always more than one possibility" appears.
If this is so, perhaps the second message could be improved? A colleague just reported students being confused by the message. Maybe no message at all would be better in this situation, since the real issue is not the lack of a constant but an incorrect formula?
Am I correct that a problem can be coded to suppress all these messages, but not to suppress just some of these messages (without fancy coding, that is)?