What we consider to be obvious, true, or commonsense depends on the various assumptions we hold. Becoming aware of our assumptions is difficult at best. Despite our belief that we know what our assumptions are, we are hindered by the fact that we are using our own interpretive filters to become knowledgeable of our own filters. Described as a "cognitive catch-22,” it is the equivalent of our trying to see the back of our head while looking directly into a mirror (Brookfield & Preskill, 1999). Becoming critical requires that we find a mirror that critically reflects our thinking and reveals our most influential assumptions.
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