It's not exactly IBIS, but inspired for sure. IBIS I think is better for modeling a live discussion, it's almost an append-only structure (to model back-and-forth), whereas Ameliorate's structure (the core is concepts with cause & effect relations) is intended to have new information integrated without duplication (which can be more annoying to do live because it can involve modification rather than appending).

Ameliorate models questions and arguments, but they're more auxiliary (modeled as being _about_ a cause or effect) than in IBIS, where they're pretty central. Questions in Ameliorate are more "unknowns" than "core questions we are trying to answer".

If you see my root-level comment in this post, I mention refining the Ameliorate ontology (ameliorate-v2) which elevates questions to first-class (to address the issue where it's hard to know where to look in the diagram, without questions to identify motivation). You might also be interested in my ontology playground in that comment if you want to see an IBIS > mermaid pipeline.