An argument, or apparent argument, which professes to be decisive of the matter at issue, while in reality it is not; a specious argument.
Deceptive or false appearance; that which misleads the eye or the mind.
The genuinity - as distinguished from the efficacity or the regularity - of a sacrament as a result of some formal dispositions being fulfilled.
The state of being valid, authentic or genuine.
State of having legal force.
A quality of a measurement indicating the degree to which the measure reflects the underlying construct, that is, whether it measures what it purports to measure (see reliability).