Second, their layout creates doubt about their ability to separate inside and outside — to be tight. (vernissage.tv)
Sometimes the paintings appeared identical; others offered reverse perspective creating doubt on how the installation should be viewed and what was real and what was not. (hamptonsarthub.com)
In any case, that comment creates doubt where in fact there is not a lot of controversy in the consensus view based on the best science available. (realclimate.org)