He is not your assistant. Make your point.Explain gravity.
Everything can be explained scientifically.
Gravity can't be explained scientifically. It can be documented scientifically, detailed scientifically, and described scientifically, but you can't explain why it exists. Only that it does.
There are in fact many things science can't explain. Even their own theories are not explainable.
The big bang for example, is a contradiction of the laws of nature. Things do not naturally go from chaos to order. And that is only one of the contradictions.