If you promise not to make pointed comments about how I can find the time to ride the train to San Francisco so that I can have brunch with a visiting East Coast friend next weekend, I will not look skeptical when you say you’ve been studying all weekend, even as I’ve just heard your cellphone conversation about your day at the beach yesterday.
Disclaimer: The sentence above is meant in a spirit of gentle good humor, and should be taken with tongue firmly in cheek. Sort of. ;)
There are two camps. I actually prefer the one in which instead of lying and pretending to study all the time you (I) lie and pretend to never study at all - while actually studying my ass off, but never letting anyone see me do it.