Whilst it could skew ones perception on their intellect, that is not a dumbing effect.
The dumbing effect comes from dull affect/apathy, if you don't care about things you once did you don't put in the effort to learn about them.
Doing nothing also has an effect. I've found my verbal communication skills degraded from a few years of not talking that much.
Words become harder to find, information is harder to recall, the will to do so isn't even there.

I think depression facilitates stupidity not through a purely emotion basis but through taking away the driving force to not be stupid/encouraging intellectual atrophy.


Abject
Bluelighter

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