There is no reliable way for human beings to refuse that a format of "God" generated the world/cosmos. But, the descriptions in the book of genesis are with contradictions.
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2017-9-27(#11075386@0)
It's a very normal cognition as you have limited knowledge base. The randomness (so called "gene mutation") is actually not a sudden. In contrast, it's always happening.Changes caused by environment are accumulative and recorded in the DNA which you may not be able to observe or verify until some certain lines of changed DNA(s) are "turned on". This is very reasonable and can be seen during the process of cell specialization, where the generic stem cells can develop themselves into difference tissue cells.
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2017-9-27{342}(#11075349@0)