Who said "We both know that's a lie."?

This quote is attributed to Morty Smith.

We both know that's a lie. - Morty Smith

"We both know that's a lie."

Morty Smith Truth

"Oh geez, oh man, I don't know if I can do this!"

"Why would you do that? That's like, the worst possible thing you could have done."

"I'm just a kid, Rick. I don't understand half of what you say."

"You know what, screw you, Rick! I'm going home!"

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."