What an Idea!!(Sagan)

"The opposite of every great idea is another great idea". If this statement is true, then it would certainly qualify as a great idea - it would automatically lead to a corresponding great idea for every great idea already in existence. But if the statement itself is a great idea, its opposite must also be a great idea. The original statement is dis proven because it leads to an absurd conclusion: that an idea can be great regardless of whether it is true or false.