>>2575
There would be no "one size fits all" standard due to the nature of various topics. In the fields of medicine, for example, it takes decades to gather enough evidence to arrive at a significant conclusion.
When a new technology arrives (such as vaping), it would not be deemed legal until sufficient studies were performed that determined that the activity was safe.
As soon as enough evidence determined that something that was legal (asbestos) should not, it would be declared illegal.
