Dentists ability to predict whether you brush or not isn’t evidence that brushing is better than not brushing at reducing undesirable outcomes, unless the undesirable outcome for you is your dentists chastising, rather than a negative health state
Dentists ability to predict whether you brush or not isn’t evidence that brushing is better than not brushing at reducing undesirable outcomes, unless the undesirable outcome for you is your dentists chastising, rather than a negative health state