Abstract
What follows is a dialogue between Maurice and Orensanz, in which they will discuss some key topics stemming from Bunge’s oeuvre. The objective of this dialogue is to advance the metascientific program even further. The main points that will be discussed can be presented as a series of questions: Is it possible to prove that the external world exists? What is matter? Is the part-whole relation transitive? What is the difference between systems and assortments? Do fictional objects have a function in ontology? Although those are the main topics, several other points will be discussed throughout this exchange.