bro you ask too many questions..
its good to be inquisitive in life but why do you keep questioning Guru ji when you take on the appearance a Sikh?
you sound confused and the more you keep conflating Gurmat with your western thinking and need for scientific proof, the more you're going to overwhelm yourself and potentially lose faith - a classic example of duality.
if you don't know the answer to something, better to stay quiet and do your own research i.e. Gurbani as well as rehitname and hukamname so you can piece together various information and find the answers for yourself..
Then there is no incentive to make the cure in the first place.
Why become a scientist and study/research for years when in the end, you will get nothing out of it (aside from I guess moral upliftment).
These people have families to feed as well.
All Sangat know that this anti-Sikh troll mahandulai has been posting bait recently.
It now turns out from a search of his IP address that this guy's real name is Mahmud Ullah Dulai.
But he thought he could troll freely on here by tweaking it due to his Pakistani Jatt surname.
And guess what this Pakistani Dullard aka mahandulai was the same cat trolling as Guest puzzledtoo