Say you have a medical doctor, or someone who studied computer science (or another field based in science) who graduated with their degree in, say, 1980, and are still working today. Is there any sort of retesting or recertification as new information emerges? Our understanding of STEM, health, and many other fields are constantly changing. Things we believed to be factual in the past often times aren’t in the future. So do professionals in fields like that, who began in these fields decades ago, actually have to learn new things as we learn more? Or can they just keep using outdated techniques?