Please do not put words in my mouth: I'm not pretending that bias doesn't exist. What is "unadopted bias"? Searches with Bing and DuckDuckGo come up absolutely

Please do not put words in my mouth: I'm not pretending that bias doesn't exist. What is "unadopted bias"? Searches with Bing and DuckDuckGo come up absolutely empty and I find the usage befuddling. I can find literally nobody and nothing on the Internet who/which speaks of "unadopted bias"? [Is that better, Ycombinator mods?]