When the whole crew turns left and your gut says right, values are the compass that keeps working with zero signal.

Groups build their own momentum, and in the moment it is genuinely hard to tell being persuaded apart from simply going along. Values are useful precisely because they were settled earlier, in a calmer hour, by you rather than by the room. They still give a reading when nothing else does.

Decide in advance what you will not do, while nothing is at stake, and put it into plain words. Then in the moment you are following a decision rather than making one under pressure. Leaving early is always available and costs less than it appears to.