...Take in contrast that he works as a computer technician or something or the sort.
I know one or two computer technicians myself. It's indeed a miracle that they even dress themselves. In all seriousness though, just because someone does a certain type of work doesn't mean they are an expert, not does it mean they won't lie to you. I once saw a student get in an arguement with a technology professor, because he beleived that HP stood High-Performance, instead of Hewlett-Packard.