My issue with TLA is that it states that "There is no depression Gremlin". I disagree: I think that there may be depression Gremlin, we're just unable to reliably discover it yet.
Saying that you have “depression” doesn’t give you an understanding of what’s causing it.
We have a baby with colic. What does that mean? It means the baby cries 3 hours per day for 3 days a week for at least 3 weeks with no other explanation. That’s it. It’s not something you can point to and say oh that explains it. That’s the cause. It literally just means there is no explanation.