I'll explain further: When (most) people see "PhD" they immediately go to "doctor", because that's what it's "shorthand" for to them, PhD means doctor, it just does and so whereas "doctor's" is 8 keystrokes, "PhD's" is 5, and just happened to shorten the text enough to make it the way I like it, but whether it's the way you like it I could care less. Again, people get the "idea" of the meme, you're just nitpicking because it's your only possible rebuttal to the thought.