#1. Science cannot disprove the existance of any god.

#2. Science cannot prove the existance of any god.

This is because science is only capable of measuring reproducable phenomena.

!BUT!

Science can show that certain events could not have happened without divine interference.

Such as the world wide flood of the Bible.

Which is the point I usually diverge from the religious ones. Anything can be claimed, with divine intervention. At which point, I don't see the sense of discussing "science" with them.