One of the few things about Enterprise that we found a problem with was when Captain Archer encountered the Ferrengi. Now, logically, since this is mankind’s first foray into deep space then there would be careful records kept of every species encountered and weather they should be considered hostile.
In the episode “acquisition”, Archer encounters a group of beings who would gladly sell their mothers to get their hands on the highest paying affiliate program or the latest federation gadget or whatever and, apparently, never told anyone about them because roughly 200 years later Captain Piccard had never heard of them.
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