A feeling of certainty; firm trust or belief; faith.
Information held in secret; a piece of information shared but to thence be kept in secret.
Self-assurance.
Doubt or disbelief of religious doctrines
The practice or philosophy of being a skeptic.
The doctrine that absolute knowledge is not possible
A studied attitude of questioning and doubt
A methodology that starts from a neutral standpoint and aims to acquire certainty though scientific or logical observation.