[deport]

A doctoral degree (PhD) is a degree that one earns after a
master’s degree. A PhD entitles a person to use the title
doctor. These are the social and physical scientists who
conduct and evaluate published research. A PhD degree is
normally obtained after six to eight years of hard work past
the bachelor’s degree.

[DugwayDuke]

deport wrote: “A doctoral degree (PhD) is a degree that one earns after a master’s degree.”

So, you admit it would have been more correct to indicate that Cambell was a PhD, not a medical doctor?

[steve86]

“A PhD degree is
normally obtained after six to eight years of hard work past
the bachelor’s degree.”

3 to 5 years.