Philosophers talk a lot about reasons. Reasons for belief, reasons for action, etc.
Personally, my favorite reason is, "AWw, c'mon," as in:
"You know you want to see that movie."
"No, I don't"
"Aww, c'mon."
"Well, okay."
It's suprisingly versatile:
"Go ahead, shoot. It's just a cat. It'll be fun"
"I'm not sure it's right."
"Aww, c'mon."
[bang]