Two identical learners, observing different example input, or the same examples, but in different order, can form different categories and so judge newer/later input differently. Reality will come to be conceptualized in different ways. Alternate conceptualizations of reality underscore the need for scientific pluralism. (See, also, R. Jones, Trans. Kansas Acad. Sci., 2013, pg 78 and my blog of 17 August 2012)
In the science of economics a marketplace is one popular model. In this model competition and individuality are emphasized. But, in keeping with scientific pluralism, we need other models for a better, more complete description of reality. A family is another good model. In this model cooperation and collectivism is stressed.