I haven't got a brain...only straw.
How can you talk if you haven't got a brain?
I don't know...But some people without brains do an awful lot of talking...don't they?
Yes, I guess you're right.....
* Wizard of Oz *

Why, a four-year-old child could understand this report. Run out and find me a four-year-old child. I can't make head or tail of it.
Duck Soup, spoken by Groucho Marx