Premise:
"216 "At first, the thing seemed utterly impossible."
Hypothesis: It was always viewed as possible.

no

Premise:
"I should also say that while I love the idea that the universe is nothing but a mathematical model of itself, I've never met anyone else who found the idea of software without hardware even remotely plausible."
Hypothesis: I meet people all the time who think that software without hardware is plausible.

no

Premise:
"They were landscaped in 1862 with a large consignment of plants from Kew Gardens in London."
Hypothesis: Upon the king's request, they were landscaped in 1862.
it is not possible to tell