Earlier quoted context omitted.
If you can explain the difference, maybe you can help me make sense of postmodern philosophy.
This has nothing to do with postmodern philosophy. There is a difference between the reality, and a human's conceptualization of that reality. In fact, we can abstract further and say that there is a difference between X and the concept of X. Now, the GP comment is saying that the model of X (which is how a human being conceptualizes X) is different than X. So, when you look at nature as it is, there are no electrons…
but this claims that the concept-of-electron as a discrete entity which the what-we-call-electron only approximates at best.
But because concept-of-electron is unscientific (aka, it is not produced from a falsifiable hypothesis), you can claim anything from it, including that it exists and supercedes the what-we-call-electron.
aka, it's akin to claiming god.