Skepticism
Definition 1 of 4
Pro Tip 1/2
Not mere denial
Skepticism involves doubt but isn't flat-out rejection; it's questioning validity. His skepticism didn't mean he denied global warming, just that he questioned some evidence.
Pro Tip 2/2
Healthy questioning
Skepticism can suggest wise caution in believing new information without proof. Her skepticism about the fad diet led her to research more before trying it.