A Realist and a Constructivist stumbling on a rock

After stumbling on a rock, a Realist says:

• "... 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.

A Radical Constructivist, after stumbling says:

• "... SOMETHING, in contrast to our thoughts of SOMETHING, surely DOES exist outside of thought, a fact that alone explains Alison’s stumbling on SOMETHING along a road in Vermont without first thinking it into existence ....
• ... BUT TO THINK SOMETHING AS  'STUMBLING' AND SOMETHING AS A 'ROCK' REQUIRES MY OWN MENTAL CONSTRUCTION OF IT AS 'STUMBLING' AND AS A 'ROCK' ..."

see also 2.12.2010
http://marco-bettoni.blogspot.ch/2010/12/david-k-johnson-sleepysand-in-minds-eye.html