The implication of an “actual” form of this property spawned controversy surrounding the Barcan formula. An essay titled for this property discusses the “spatio-temporal connotations” of the word “Pegasus” in a sentence (-5[1])by a philosopher dubbed “McX” (10[1])and features an argument named (10[1])after “Plato’s beard” for dulling Occam’s (10[1])razor (10[1]-5[1])by ascribing it (-5[1])too often. (-5[1])The Quine–Putnam (-5[1])indispensability thesis supports a stance sometimes referred to as Platonism (-5[1])that assigns this property (10[1])to mathematical (10[1])objects. (10[10]-5[1])The logical operator (10[3])written as a backward capital E (10[13])quantifies (10[5]-5[2])this (10[2]-5[1])property, (10[14])which is the (10[1])subject (10[1])of study (10[2])in ontology. (10[4])For 10 points, name this property given to matter by materialists (10[3])and to numbers (10[1])by mathematical realists. ■END■ (10[6]0[6])