The reason why I think it most generally applies to “business writing” is because this area is most likely to value efficiency over others.
I don’t think it’s meant to say business folk should write like Hemingway, but that Hemingway is the most popular writer in this style.
Agreed. The general style values simple sentences which helps reading speed and comprehension, especially for audiences that don't share your native language. And it reduces fluff. Adverbs, for example, generally don't help make a point in business writing - data does.
See the example in that last sentence? I snuck a premise instead of stating it as a hypothesis or providing data to support it. At best that causes confusion for the reader and at worst it can mislead people that aren't carefully watching out for pitfalls like that.
A premise is a hypothesis. We don't explicitly tag all our premises; it's up to the reader to decide if they agree with the premises.
>We don't explicitly tag all our premises
True but we should aim to tag more of them in business writing. It's helpful to clearly state them so 1. You as the writer are crystal clear on the assumptions you're making, and 2. if there's any disagreement on premises you can resolve it before you spend any time discussing which course of action to take.