AKA brain fog; cognitive impairment; period during which higher executive function is affected; difficulty thinking

It can be caused by many things. Commonly it is due to fatigue, physical duress, or intoxicants.

Generally it is temporal in nature. It comes and goes.
Summer heat and insomnia ganged up on me. After the cog fog hit forget writing, I couldn't even remember the day of the week !
by FichenDich August 29, 2017
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