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theory related concept comparison table
Subject has definition
consistentThe property possessed by a scientific theory when it contains and extends an earlier well-supported theory; for example, general relativity is consistent with Newtonian gravity.
experiment 
fine-tuningA phrase meaning a highly constrained and implausible adjustment of the parameters of a theory.
free parameterA number which is needed to define a theory well enough so that predictions can be made, but which must be determined by experiment or observation.
prediction 
problem 
thought experimentAn experiment that cannot be or is not carried out in practice, but can, given sufficient imagination and rigor, be reasoned through by thought and intuition alone.

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