The physics of first-person perspective: An introduction

But the statement clearly words it that physical entities are the products of observation, not just always happening coincidental with observation. Hence the statement being both self-contradicting and violating causality.

I don't think it's really violating causality because Consciousness exists before the physical entities in Idealism?

As Kastrup notes, under that ontology physical entities are not at the Ground level of reality.

This isn't to say the view is correct, just there is nothing contradictory in the statement...