Infinite regress and debunking karma

[Anomalocaris]

Karma isn't a theory in the same sense that evolution isn't a theory.  

Evolution is descent with variation culled by natural selection.  

The theory of evolution is a theory.

yeah, evolution is a process that happens in nature

a process is not a theory; I totally get that

freefalling is a process; gravity is a theory

no, both gravity and evolution are theories.    but they are both consistent with broad observations or processes in nature with a minimum amount of ad hoc adjustment, and exhibit high degree of accuracy and precision in predicting the outcome of processes before these have been confirmed by observations.     Therefore these theories are very likely to be close mental conceptual analogues of the parts of the actual process in nature these theories cover.

of course the natural processes may have deeper roots and broader impact not yet covered by the theories, but to the depth and breadth the theories do go, they appear accurate.