My non-dialectical take would be:

I want to make a predictive model of the deer and explain it. For this, I need to analyze the variables that make up and influence the deer. After analysis and criticism, I will decide, based on what I expect of my model, whether I need to include external variables or only internal. For example, in order to understand the mechanics of how the contraction of a muscle leads to the movement of a leg, I don't need to concern myself much with external variables. If, on the other hand, I need to explain the diet of a deer, looking at internal variables isn't enough, because there are very relevant external variables such as season, geographical location, etc.

If you go dialectical and try to explain the leg mechanics of a deer in terms of contradictions and in terms of external variables, you're going to create an unnecessarily complex model that doesn't give better predictive capabilities than a simplified one, which requires more study and more effort to reach the same conclusions.

I'll try and download that book, though a priori from the index it looks to delve deep into materialism and less into dialectics. It could be a good exercise to try and distill the dialectics from the dialectical materialism, and see exactly what I'm missing.