What do you read here? Is it (El, one, one) or (El, el, one)? What if this was part of your password and you just don't know what the f*ck it is? Enter (mosty) sans serif. This is case where Serif types are better suited than their sans counterpart. This is my case to paying attention to what is actually in front of you while you are designing. And my case for password manager software to use Serif types when displaying a password. Rendered on Serif reveals the mistery: Do not discard Serif types in your stack of visuals!