the.com/skeptic

means Someone who withholds belief until the evidence earns it.

from From Greek skeptikos, 'inquiring' or 'reflective,' from skeptesthai, 'to look carefully, to consider.' It named a school of ancient Greek philosophers who held that certain knowledge is unattainable and that one should suspend judgment rather than claim certainty. The word carried that root sense of 'looking closely before deciding' into English, where it settled into its modern meaning of doubting until shown proof.