As a devoted JW, I believed for decades in WT version of creationism, mostly because my "knowledge" was based on WT literature. After I started to doubt in WT dogmas, I started also to recheck everything I believed. Among the last things was creationism / evolution. I spent months on that topic (at the same time i had to use evolutionary algorithms to optimize some process at my study of mechanical engineering), and, to make long story short, I found that there is nothing to "believe" - evolution is the fact, and theory of evolution is the best explanation of that fact. It is universal no matter what you observe - biology, chemistry, engineering, social science, economy, management - in any field you can successfully use the same principles to find solution, it works the same - the best proof of theory of evolution.