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by jakub_g 383 days ago
For me the mental fatigue is mostly related to context switching, being disturbed (slacks, meetings etc but also side quests to the original problem), and working on a fuzzy problem.

Working a few hours in such environment is very fatiguing.

On the other hand, when I work on a single thing, no disturbance, clear problem definition, having all necessary skills to do the thing, I can work 10h and it's not fatiguing.