The problem is we don't know a lot about the probabilities of abiogenesis. We do know the basic components for life, such as complex hydrocarbons and amino acid

The problem is we don't know a lot about the probabilities of abiogenesis. We do know the basic components for life, such as complex hydrocarbons and amino acids, do occur in non-biological nature. The question is how likely they are to combine into something self-replicating. > Essentially it was about how all species branch from DNA That is not correct. Most models consider RNA as a precursor to DNA. Over time, RNA has come to fulfill more narrow intra-cellular roles, but at some point in time it was probably the dominant gene format. By the same token, it's likely that RNA as an information carrier was preceded by other molecules, and very early proto-organisms might not even have had a unified gene carrier system - they might have been just "running systems" that split in two every once in a while. > (ii) we evolved into advanced technological species. This is also doubtful. Humans do combine several fortunate intellectual capabilities, but the components making up our neuronal structure are not unique to us. What's more, we do find advanced capabilities in organisms that developed after we split from a common ancestor, suggesting that the building blocks of general intelligence might arise readily under different circumstances and using different biological implementations (albeit with the caveat that we share a common biochemical machinery, the details of which may or may not make general intelligence more likely).