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I've had people present the perfect candidate with over 10 years of experience. On paper, you'd think they could rewrite the Linux kernel single-handedly in under a week, but when asked to write a Python script to check if a word is a palindrome, they have no idea. Similarly, candidates appear to know the TCP/IP stack inside out, but when asked to set up basic AWS VPC subnets and routing, they're completely clueless. They just parrot some bargain-basement course answer that is entirely incorrect.
Sounds like you have some racist biases to work through.