When the PCs need to gain favor with or sway over an NPC to achieve their goals, sometimes a Deception, Diplomacy, or Intimidation check isn’t enough to get the job done. In these cases, you can implement the influence subsystem in a social encounter.<br /><br /> Influence is a short-term...
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The discover-action, that is supposed to be used during the social / influence encounter.
As far as I understood it, the Discovery is supposed to happen during that specific interaction with that NPC and not beforehand.
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But I would say, using concrete Examples from things that happened at the table are clearly helping the discussion.
Seeing how things actually play out at a table is different from just looking at abstract game rules.