The state or quality of being perplexed; puzzled or confused.
Something that perplexes.
In information theory, a measurement of how well a probability distribution or model predicts a sample.
A studied attitude of questioning and doubt
Doubt or disbelief of religious doctrines
The practice or philosophy of being a skeptic.
The doctrine that absolute knowledge is not possible
A methodology that starts from a neutral standpoint and aims to acquire certainty though scientific or logical observation.