There’s a reason why you feel more intelligent when you drink your coffee.
Feeling sleep deprived leads to a feeling of a dull mind where we’re less able to make decisions or reason things out.
Caffeine has been connected in repeated studies to higher brain efficiency and clearer thought in study participants.
Your caffeine jolt improves your reaction time, attention, logical reasoning, and vigilance; these are all of the functions associated with intelligence.
This makes a great argument for drinking coffee for more than just feeling more awake!