perplexity
This term describes a state of mental disorientation or a structural complication that defies immediate logic. It carries a heavier weight than simple confusion, suggesting a profound sense of being baffled or entangled by a puzzle that seems unsolvable. In technical fields like information theory and linguistics, the word shifts from a subjective feeling to a precise mathematical metric. In this context, it quantifies the uncertainty of a model, where a lower value indicates a more accurate prediction of the data.
Meanings
The state of being confused because something is difficult to understand.
"His expression was one of utter perplexity when he saw the results."
A complicated or confusing state of affairs.
"The legal perplexity of the inheritance case delayed the trial for months."
A measure of how well a probability distribution or probability model predicts a sample.
"The researchers used perplexity to evaluate the performance of the language model."