True, only if you: 1. find 1 example that isn't hiding a well known problem 2. meets the secondary requirement of showing long term use at capacity 3. I chea

True, only if you: 1. find 1 example that isn't hiding a well known problem 2. meets the secondary requirement of showing long term use at capacity 3. I cheated more than you know for #2, as I already know modern concrete tends to fail in less than 65 years. And even if you use the premium long-term stuff, it still generally becomes permeable to liquids even surrounded by mostly solid rock 4. a three data-point trend would prove your point better if my knowledge is antiquated, and my opinion is out of date (more data is not changing requirements) 5. Goats can survive radiation levels several times higher than primates, and are still used for transportation in many primitive cultures 6. Radon poisoning is a thing too... Goat carts are likely our future, as they are self-replicating and do not require sophisticated agriculture. =3