Here's the simplest example of 'alternative facts': " the glass is half-empty" versus "the glass is half-full"..... Both are factually correct, but one conveys negativity, the other conveys positivity..... Complicated examples of 'alternative facts' can confuse or mislead the listener/reader/viewer..... It's much like 'lying with statistics' (a really good easy book to read is 'How To Lie With Statistics').... Example: A boss says "I'm going to lower salaries by 50%, but only for 1 month; after 1 month I will then increase salaries by 50%". That may sound like a return to the same pay, but it's not (if you were getting $100/day, and reduce it 50%, it's $50/day; increasing $50/day by %50 only raises it to $75/day)