Definition:Singular Statement/Designatory Function
Also known as
A designatory function is also known as a descriptive function.
- $2 x + 1$
is a designatory function.
Returning to a previous example:
- The King of Siam in the year $x$
is arguably not a designatory function, because not every value of $x$ returns a valid [Definition:Individuating Description|individuating description]].
- 1946: Alfred Tarski: Introduction to Logic and to the Methodology of Deductive Sciences (2nd ed.) ... (previous) ... (next): $\S 1.2$: Expressions containing variables