When he announced on May 1 that masks would be worn in public places, Massachusetts governor Charlie Baker was emphatic. "We view this as common sense. This is going to be basically a way of life. No ifs, no ands, no buts, no doubts." However, doubts are showing up. First, Baker's order said to wear face coverings when in public places and unable to keep a social distance of six feet. Why'd he pick six feet? There is no research showing that six feet means anything in a public space. That six-foot idea is an arbitrary guess that was "conjured...