Comment Re:Candidate found for Trump speechwriter (Score 1) 257
Unfortunately, you can't watch someone floss their teeth and see the health benefits happening. You won't know for years
Sure you can. You can examine the gunk that removed by flossing even after brushing. Is having food debris in your mouth and promoting infections a good thing or a bad thing?
Even if a person wants to be obtuse about the above, it only takes a couple of weeks to see objective evidence i.e. gum bleeding reduced or stopped, reduced inflammation and reduction in pocket size.