Yes, I know it's not that hard, but lately I've been going through a period of low mood, and I really cannot stomach the idea of diving deeper into the Abyss for a couple weeks while my receptors downregulate. It's hard enough already as it is.
The reason you can't is because in this sentence, you are saying you can't (or won't).
The "cup" measure of coffee is a blunt quantization. My ideal amount is approx 3-4 oz.