Suppose I have promised to keep a confidence
1. There is an Action A
and someone asks me a question that I cannot answer truthfully without thereby breaking the promise. Obviously, I cannot both keep and break the same promise.
2. There is an Action B
3. If you do Action B you cannot do Action A
Therefore, one cannot be obliged both to answer all questions truthfully and to keep all promises.
4. Therefore you cannot do B and A
So our argument structure looks like this:
Action A
Action B
If Action
...
1. There is an Action A
and someone asks me a question that I cannot answer truthfully without thereby breaking the promise. Obviously, I cannot both keep and break the same promise.
2. There is an Action B
3. If you do Action B you cannot do Action A
Therefore, one cannot be obliged both to answer all questions truthfully and to keep all promises.
4. Therefore you cannot do B and A
So our argument structure looks like this:
Action A
Action B
If Action
...
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