Agreed on the tone, that's unnecessary. Even my own post is borderline... I'll edit it to fix that. But this guy is ostensibly a professional. His CV lists a

Agreed on the tone, that's unnecessary. Even my own post is borderline... I'll edit it to fix that. But this guy is ostensibly a professional. His CV lists a host of industry experience over the years. And yet it seems he doesn't understand recursion? That's... Remarkable.