It's not faulty logic at all. Scientists have known for a while that your ability to experience pleasure is a result of certain biological processes Well of co

It's not faulty logic at all. Scientists have known for a while that your ability to experience pleasure is a result of certain biological processes Well of course on a certain level your ability to feel anything is the result of biological processes, but that doesn't mean that the specific things you feel aren't a result of the specific experiences you've had. Nobody in this thread is arguing that feelings happen completely independently of biological processes, but there's a hugely important difference between "I had a bad experience that altered my feelings, and that's reflected in my biology" vs "my biology just did something of its own accord that had nothing to do with my life circumstances, and that change altered the way I feel". You seem to be arguing that because anhedonia correlates with certain biological changes, that it must be caused by those changes. That could be true (and probably is true in some cases) but it does not necessarily follow that it is always true, or even true the majority of the time; the causation could could flow in a different direction.