| width="250" align="right" |<small>''<translate><!--T:38--> The black swan symbolizes one of the historical problems of epistemology: if all the swans we have seen so far are white, can we decide that all the swans are white?</translate><br><translate><!--T:39--> Really?</translate>''</small>
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| width="250" align="right" |<small>''The black swan symbolizes one of the historical problems of epistemology: if all the swans we have seen so far are white, can we decide that all the swans are white?<br> Really?''</small>
| width="250" |<small>''<translate><!--T:40--> Kuhn used optical illusion to demonstrate how a paradigm shift can cause a person to see the same information in a completely different way: which animal is the one here aside?</translate><br><translate><!--T:41--> Sure?</translate>''</small>
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| width="250" |<small>'' Kuhn used optical illusion to demonstrate how a paradigm shift can cause a person to see the same information in a completely different way: which animal is the one here aside?<br> Sure?''</small>