In this commentary I want to stress two issues: My appreciation for the overview of MIR-related theories (it can be considered a challenging first step toward an even more comprehensive overview) and the need to move on with constructivist issues. I am writing from a pragmatic perspective. The sophisticated formulation of radical constructivism (RC) seems to be the result of a long historical line of argumentation. Now the interesting questions arise: how can we use it? Will it provide insights and mechanisms which can actually be used to alter the way we approach (everyday and scientific) problems?
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