Answer:

skeptics

AnswerCrossword Clue
SKEPTICSDoubters
SKEPTICSDoubters.
SKEPTICSDisbelievers
SKEPTICS"Show-me" men
SKEPTICSThey have reservations
SKEPTICSDoubting Thomases
SKEPTICSPeople with questions
SKEPTICSThey're doubtful
SKEPTICS"Show me" types
SKEPTICSShow-me types
SKEPTICSThey ask for proof
SKEPTICSThey're beyond belief