When Data Meets Theory (I) If new data fits in with existing theory No problem If new data does not fit existing theory, two options 1Reject the data – pretend it doesn't exist Not the way scientists operate 2Conclude that the theory requires revision 1Revise the theory, or 2Look for a new theory 3At least, pending construction of new theory, recognize that there is a problem, and stop believing in the old theory 21
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