You can't assign '=', '' to doctors on the one hand and professors and PI's on the other.
'Doctor' is a title you get by earning a degree (at least in academia), while 'professor' is a job you hold, perhaps temporarily.
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You can't assign '=', '' to doctors on the one hand and professors and PI's on the other.
'Doctor' is a title you get by earning a degree (at least in academia), while 'professor' is a job you hold, perhaps temporarily.