On his account, haecceities are logically simple but non-general properties.
Those of the former sort suggest that haecceities are logically simple, the latter that they are logically complex.
To get at the chief problem, first, define a property or relation to be logically simple (simple, for short) if it is not itself a negation, conjunction, disjunction, quantification, modalization, etc. of any other properties or relations.
A somewhat stronger move for Plantinga is to deny that haecceities are logically complex and take them instead to be logically simple, as suggested by grammatically simple gerunds like 'being Quine' that do not involve reference to identity or any other property or relation.
Idaho pastor and blogger Doug Wilson came to Piper's defense, saying that the theological issues are logically simple but emotionally complex.
IDT formalizes designers' verbal statements as either analytic or synthetic propositions through a cyclic operation of "specify-ideate-validate" at each abstraction level to generate a design concept which is logically feasible, functionally simple, and physically certain.
Because we can sometimes discover that a thought τ is logically entailed by a set T of thoughts only after a careful analysis of some of the apparently-simple components of those thoughts, so too we will sometimes be able to discover that a set of thoughts is inconsistent, i.e. that it logically entails a contradiction, on the basis of such conceptual analysis.
This point is logically necessary.
Also, his position is logically consistent.
