Occam's razor

So, sometimes lethargy (as documented below) has a spiritual or intellectual basis. But sometimes it just means that you're getting sick again, and the reason you're so tired is because your body is fighting something. For the third time this year.

Last Friday I was chatting with the chair of a department that is not mine (located in another state, even) and he had a cold and was coughing and sneezing with not so much mouth coverage. And I wanted to say to him, "Didn't your mother teach you anything? Please cover your mouth when you cough." But I did not. And now I believe I am paying the consequences. Oh well.