Sin means an offence, violation, wrong, etc. You can know and experience sin by viewing the actions of violence, lawlessness, corruption, etc. that people all around the world are committing.
One example is the existence of cryptids. There are hundreds of sightings we all know they exist but scientists can't prove they exist.
We don't. It is impossible to prove a negative. It is called the Paradox of negative information. You can only prove something does exist, you cannot prove non-existence.
the existence of released energy
How do you proof of the existence of back emf ?
No. Any person trained in logic will tell you that 'you cannot prove a negative'. If you want to disprove the existence of fairies you first attempt to try and prove their existence. And the best you can do is to fail to prove it. The option to prove it always exists.
No. But then can you prove that you do?
No. Spirituality is essentially the belief in a spiritual existence, which may or may not include magic. Even if it does, belief in something does not prove its existence.
Not correct. sin2alpha + cos2alpha = 1
I do not know what you mean by "eternal sin", but what I do know is that, suicide is indeed a sin.
I liek chocolate milk.
there are none... it's called faith
So far scientists have not been able to prove or disprove existence after death.