We now live in a world of facts and alternative facts. Just to make it clear, facts are true and non-facts are not true. True and false. Black and white. Could facts turn out to be non-facts? Sure, it is possible, but scientific truths, i.e. facts, are usually measured, tallied, counted, concrete, and iron. They are the things we know, for a fact, are true. Things like global climate change.
A hypothesis, on the other hand, is a strong theory based on the facts that is likely. There may or may not be a way to prove it absolutely true, but the facts point to it being true. A scientific hypothesis is often backed up by other scientists, published in a journal, argued, debated, and open for discussion.
Why would I write about global climate change, being a business writer? Because as business people, we often have to make tough decisions based on the facts. If there can be two sets of facts, well then, how do you make good decisions?