This is the basis of the modern scientific method. It blossomed in the 17th century, when a new breed of thinkers took the view that scientific knowledge can only come from first-hand observation.

Indeed, the scientific method, with its insistence on direct ... a 250 mg dose to the 500 mg dose and also to a placebo-control. In every experiment, the principal investigator has control over ...

This week, the spotlight is on the scientific method: As the world scrambles to deal with the spread of the coronavirus, scientists around the world are working hard trying to devise a vaccine.