- "a THING, in contrast to our thoughts of that THING, surely does exist outside of thought"
- "But rocks, in contrast to our thoughts of rocks, surely do exist outside of thought, a fact that alone explains Alison’s stumbling on this rock along a road in Vermont without first thinking it into existence." From: Johnson D. K. & Silliman M. R. (2009) Bridges to the world. Sense, Rotterdam, page 8.
- The fundamental emotion of Johnson's critique “is powered by the authority of universally valid knowledge” (Maturana & Poerksen 2004:41-42) and the basis of its explanations is the reference to objects in the external reality.
- This kind of criticism to RC originates from an unaware confusion between what belongs to RC and what belongs to Realism.
- A blind spot makes that critics do not understand how to deal with things in themselves and as a consequence easily overlook the intimate relationship between the two sides of the radical constructivist coin: construction & viability.
Maturana, H. R. & Pörksen, B. (2004) From Being to Doing – The Origins of the Biology of Cognition.