Outside official knowledge. Normally when i want to point something that is outside the approval of the company or a government or any entity (for instance, non-official statements, non … The bound morpheme non is the negator for life-threatening here, so 'life-threatening' is more coherent.

Except non is not an english word, it is a prefix of latin origin. Which is why american style manuals will always ask you to merge it with the subsequent word, without a hyphen. British rules differ, and …