Are Particles 'Physical Things' or 'Abstract Ideas'?

[Mudhammam]

Since what is "concert and substantial" can never be more than "concert and substantial in theory", it seems to me the distinction between "concert and substantial" and "theoretical and notional" is but an Rbitrary diction based on degree, without fundamental or clear cut difference.

The difference is found in how substances move (which are then formulated into theory) and how ideas move (which are formulated into grammatical and logical structure). Think of the difference of pure perception as in a waking state unaccompanied by rational labels, and pure conception as in a dream state accompanied by them.