uncertainty

If the certainty of the wisdom of uncertainty is itself uncertain, the force of the definition crumbles by logical standards.

The person stopped where the road branched off, as if in uncertainty which to take.

The one, rich and full though accompanied perhaps by pain and even denial at times; the other fraught with uncertainty.

This uncertainty seems to indicate a certain superficiality in the ordinary empirical way of looking at evolution.

This uncertainty made a most feverish moment on board the Proserpine, as she came up fast toward the headland.

The mere admission of such changes may suffice to indicate the doubt and uncertainty which attend enquiries of this nature.