Is okay to choose A simply because B is quite literally orange hitler?
Obviously yes. Doing so isn’t saying A is fine, doing so is saying B is worse, and bad is still better than worse.
If you tried to say that there was no reason to be concerned with A because B was worse, that’s a fallacy. But acknowledging that one of two options, while still bad, is LESS bad, isn’t a fallacy. That’s just being realistic.
One I see people use frequently and I’m not sure they realize it’s a bad argument is the fallacy of relative privation.
“X is bad. We should do something to fix X.”
“Y is so much worse. I can’t believe you want to fix X when we need to fix Y.”
Both X and Y can be bad and need to be fixed. Fixing one doesn’t preclude fixing the other.
An alternate form of this is:
“A is bad”
“B is worse, so A is fine.”
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Obviously yes. Doing so isn’t saying A is fine, doing so is saying B is worse, and bad is still better than worse.
If you tried to say that there was no reason to be concerned with A because B was worse, that’s a fallacy. But acknowledging that one of two options, while still bad, is LESS bad, isn’t a fallacy. That’s just being realistic.