You can distill helium out of the air. There's some left. The cost would be around 10x the cost of neon, though. And if you have to ask what neon costs...
Actually, people do distill some helium out of the air. It comes out with the neon as "noncondensing gases" in the column. Those gases get sold to some buyers of neon, who don't mind some extra helium in the gas. Neon signs aren't too picky, iirc.
There have been cases of criminals finding ways to substitute another person's DNA for their own, including one case of a doctor who actually managed to hide another person's blood in one of his veins, thus faking his innocence.
Do you have a link for that? It sounds fascinating.
For 100% certainty you need religion
Or math, the queen of all sciences (ducks from flames)
Really? I don't think 100% certainty means what you think it does. Have you ever made a mistake proving a theorem? Has a peer-reviewed published theorem ever later been found to have a mistake? Is it even remotely possible that it will happen in the future? If so, you need to assign a level of certainty to any given theorem: a probability that it has a mistake. As it gets used more a scrutinized more, that probability declines dramatically, but it can't reach zero. Zero and one are not probabilities. There's a big difference between 0.99999999, or any other finite number of nines, and infinite nines. For the same reasons that infinity is not a real number, zero and one are not probabilities or certainties.
EVERY HOUSE should have the option for affordable or free internet, its that important.
Free internet service? How does that happen? Oh, you mean "paid for by someone else". Is it really that important?
It's really hard to get a job without an Internet connection. Sure, it can be done, but it's harder. It's almost as important as having a phone number and address. Would it be cheaper to subsidize Internet access than to pay unemployment benefits? Or to forgo the taxes that get collected from people who are employed?