Earlier quoted context omitted.
You can reduce pregnancy to 0.00001% and there'll still be a baby. As in, "you can't be half-pregnant". A tool is either deterministic (within some limits [0]) or it isn't. [0] For example, for the purpose of driving a nail, if you know how to use it, a hammer is pretty straightforward tool, and what happens depends pretty much on how you use it, and what you use it on. But of course the handle can break, there could…
Exactly, like weather forecasting. If you're told there's a 30% chance of rain, it doesn't mean that 3 out of 10 times you will experience rain. Either it will rain or it won't, so the probability is either 0% or 100%. And so a forecast of "30% chance of rain" is referring to the likelihood that your probability will be 100%, as opposed to 0%.
This is a huge misunderstanding of what probability means.