perplexity

noun3

1. •
   The state or quality of being perplexed.

   • There is no such thing as 'chance', which term only signifies the mind's perplexity in the face of events that spring from multiple causes. — 1978
2. •
   Something that perplexes.

   • The Emperor, who was by then a focus of unresolvable perplexities, stood providing a strongly contrary appearance. — 1942
3. •
   A measure of the accuracy with which a probability distribution or model predicts a sample.