[cogitator]

All factors have to be considered. ... I doubt that all factors are being considered.

In order to do the science effectively, the most significant factors should be the ones that get the most attention. Factors that have a very minor effect are ... minor factors.

[etlib]

In order to do the science effectively, the most significant factors should be the ones that get the most attention. Factors that have a very minor effect are ... minor factors.

But then you must show that they are indeed minor factors. Factors that seem minor have an annoying habit of having major effects over time.