“I don't know. I'm making this up as I go.”
“I don't know, I'm making this up as I go.”
“Would it make you feel better if I pretended not to be making it up as I go along? [...] In that case, I know exactly what I'm doing, but please don't ask me about it in any great detail.”
“I'm an idealist. I don't know where I'm going but I'm on the way.”
“I don't know where I'm going, but I'm on my way.”
“Since I don't know where I'm going, I guess I'm in no real hurry to get there.”