can you proove the existence of Disinfectant
Only by the pretty commercials that show the cute little 'germies' before disinfectant, and then much less of them after disinfectant.
yes really, what kind of question is that? walk into any supermarket and you will find at least 10 different brands of it
Sure. Here's a bottle of Dettol. Go wild.
It depends on what you believe.