I stumbled across a phase used in statistics one time and have it posted prominently where I can see it when making coding changes to my system:
"Correlation does not imply causation"
Defined elsewhere as:
"Causation is the relationship between cause and effect. So, when a cause results in an effect, that's a causation. ... When we say that correlation does not imply cause, we mean that just because you can see a connection or a mutual relationship between two variables, it doesn't necessarily mean that one causes the other."
Year to year, there are few variables or conditions that are persistent profitably at one track let alone all tracks. That's my humble opinion after data mining thousands of races at major tracks.
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