You mentioned that "units" wasn't part of your system and he pointed out that it's actually a Unix base program (i.e. part of BSD/Solaris/Darwin) that's install

You mentioned that "units" wasn't part of your system and he pointed out that it's actually a Unix base program (i.e. part of BSD/Solaris/Darwin) that's installable separately for GNU-based systems. What's the problem here? Did you really need to comb through his blog and call him out like that?