skeptic

他是个怀疑论者，从不轻信媒体报道。

As a ___skeptic, he never takes news reports at face value.

她是个怀疑论者，从不轻易相信那些流行的健康建议。

She is a ___skeptic who never easily believes popular health advice.

作为一名怀疑论者，他对超自然现象的存在持保留态度。

As a ___skeptic, he remains unconvinced about the existence of supernatural phenomena.