Type Weaknesses?

Question

Why are Ghost types and Dragon types weak against eachother? That makes no sense to me so please explain why?

Answer 1

This question has been answered. In specific, the Ghost and Dragon weakness notions have been confirmed by Yours Truly!

http://pokemondb.net/pokebase/17412/anyone-tell-reason-certain-types-super-effective-effective

Comments

Edited the question, didn't mean to put the first part

Answer 2

It's mainly to balance the game out. They wanted a powerful type for you to face towards the end of the game, so dragon only had two weaknesses. However, they knew that dragons would be used a lot competitively, so they made them weak to themselves, so that, if they are powerful, at least the metagame is a little bit more balanced.