[jerrygoyal]

> How can we be certain we're also not bound by the laws of physics and chemistry?

Try to look at it from this perspective:

We are made of 2 things: 1. consciousness and 2. a physical body. Only way to operate in this physical world is via a physical body so our bodies are bound to the laws of physics and chemistry.

When someone dies their physical body is still part of this physical world but not their consciousness. Consciousness is like a visitor to this physical world.. it doesn't belong here so laws are not applicable either.