In some cases this is correct .. but not in the case of salt in the Oceans friend .. and since you are not knowlegeable enough about science to assess whether or nor something is scientific ... you should not be making defacto claims on the subject ..
For Example - your challenge to prove something without assumtions -- blows up all science .. and is completely unscientific .. the reverse in fact , it is anti-Science - anti-Logic and Reason, which carries over into beliefs. How can one be sure of the path to salvation when based on false belief ? Have you not heard "21 “Not everyone who says to me, ‘Lord, Lord,’ will enter the kingdom of heaven, but only the one who does the will of my Father who is in heaven" ?
My friend it is not the mistake that is the problem .. but lack of correction .. and I hope we have read Proverbs on this account. For what purpose was man given a brain if not to learn ? - but, this path of learning is blocked by lack of correction .. the Path to the Truth - the way, and the light is blocked to those who can not understand their own folly don't you agree ?