“Once per day, after you’ve completed the Wasted on Nukashine questline, you can speak to Biv to continue experimentation and occasionally learn new recipes.
Sometimes, you’ll be asked to imbibe various types of alcohol and perform specific tasks. Other times, you’ll learn a new recipe and will need to craft the brew to Biv’s satisfaction.”— Fallout 76 Wild Appalachia patch notes - March 13, 2019
Lewis planned to use Biv to test Nukashine. This was likely the best course of action, as a human who consumed that amount of alcohol from each drink would die from alcohol poisoning. It is unclear as to whether Biv's drunken manner of speech is a result of alcohol taste-testing, or if he was originally programmed to always sound a little intoxicated.
↑Biv's dialogue: "You know, if life ever does get you down, don't be afraid to consult ole Biv E. Ridge about what's eatin' ya."
↑Eta Psi House terminal entries#Biv: "I just found out that Lewis’s mother works at General Atomics - not from him, of course. [...] Anyways, that explains where he got the Robobrain from. It doesn't explain HOW he got it, if it's safe... if it's legal."