Also, water consumed by plants and creatures isn't lost forever. Sure, the bonds are cracked to make hydrocarbons, but the H and the O still exists. It's not like our bodies perform nuclear reactions.
I am STILL stymied by a question he asked once:
"Why does a mirror reverse left-and-right but not up-and-down?"
Turn your head 90 degrees so that one eye is higher than the other. Ta Da, it now "reverses up and down."
imagine a driver getting turn-by-turn navigation while a front-seat passenger streams music from the Internet, and each back-seat passenger watches streaming videos on separate displays.
Just because there's an internal network for the car's electronics doesn't mean there's any internet connection (and there'd better not be).
Religion serves no positive purpose
Incorrect. Even if you believe no deities exist, and you can find a perfect atheistic philosophy of morality and ethics which everyone would agree is not only good, but perfect, and people no longer fear death, religion still serves a vital role in society: some percentage of society are sociopaths; the type of people who, when they believe no one is watching and they can get away with it, will do anything evil if it gives them an advantage. They may agree with everyone else that your system of ethics is great, but they'll ignore it when it suits their interests. Now imagine a population with the same percentage of sociopaths, but with a strong cultural belief in an omniscient deity. Doctrines involving Heaven are great for the "good" folk, but it's the fear of Hell that can keep a sociopath in line. Removing that cultural underpinning increases the number of sociopaths willing to act out on their evil impulses (absent a Big Brother network).