  The abstract noun “truth” has various uses. (a) It can be used to refer to the general relational property otherwise referred to as being true; though the latter label would be more perspicuous, it is rarely used, even in philosophical discussions. (b) The noun “truth” can be used to refer to the concept that “picks out” the property and is expressed in English by the adjective “true”. Some authors do not distinguish between concept and property; others do, or should: an account of the concept might differ significantly from an account of the property. To mention just one example, one might maintain, with some plausibility, that an account of the concept ought to succumb to the liar paradox (see the entry on the liar paradox), otherwise it wouldn’t be an adequate account of our concept of truth; this idea is considerably less plausible in the case of the property. Any proposed “definition of truth” might be intend as a definition of the property or of the concept or both; its author may or may not be alive to the difference. (c) The noun “truth” can be used, finally, to refer to some set of true truthbarers (possibly unknown), as in: “The truth is out there”, and: “The truth about this matter will never be known”.