Kant’s Categorical Imperative is a moral law that states the conditions for when a maxim (a statement of what to do) is morally obligatory. The Imperative takes many formulations but the most common is of ‘Universalisability’ - only do that which you.
Hunger makes the best sauce, goes the maxim. According to researchers at Yale Medical School, it may make quadratic equations and Kant’s categorical imperative go down easier too. The stimulation of hunger, the researchers announced in the March issue of Nature Neuroscience, causes mice to take in information more quickly, and to retain it better — basically, it makes them smarter. And that’s very likely to be true for humans as well.