I read “pseudofamiliarity” as the tone you would take with an amicable acquaintance.
(Or an acquaintance who is openly a rival, where it is a minor display of dominance and a signal to others that you don’t need to consider them a threat. Not that I think it applies here.)
(Or an acquaintance who is openly a rival, where it is a minor display of dominance and a signal to others that you don’t need to consider them a threat. Not that I think it applies here.)