Another way to look at is that if you conducted an experiment where two newbies were under
identical circumstances except:
Not exact matches
A controlled experiment would put many people suffering from headaches in
identical circumstances,
except for the presence or absence of the remedy it is desired to test, and compare the results which would then have some chance of being meaningful.
Consider a second scenario, nearly
identical to the first,
except that instead of sending a «deficiency notice», the contract describes a «failure notice» for exactly the same
circumstances.