" You, ah… you present the appearance of a man with a problem."
"Your perception is correct, Doctor. In order to return us to the exact moment at which we left the twenty-third century, I have used our journey back through time as a reference, calculating the coefficient of elapsed time in relation to the acceleration curve."
"Naturally. So what’s your problem?"
"Acceleration is no longer a constant."
"Well, then you’re gonna have to take your best shot."
"Guess, Spock. Your best guess."
"Guessing is not in my nature, Doctor."
"Well, nobody’s perfect."