(1) P => Q
is invalid, the conclusion does not follow logically from the premises, EVEN IF the premises are true.
you can't just do what you want and say what you want to come up with the conclusion. there are rules that you have to follow. of course when i say "follow logically from the premises" i mean it can be "derived from the premises using the rules of inference for logic"
please review the laws of logic... did you take my advice and looked up what "valid" and "sound" means?