for a suitable
; and although (in a sense) this may be true in some cases, it is certainly not true in such a case as "a unicorn." It is just this fact, that the statement that a so-and-so has the property
is not of the form
, which makes it possible for "a so-and-so" to be, in a certain clearly definable sense, "unreal." The definition is as follows:—
The statement that "an object having the property
