Silly: In an arcana check to determine the precise location, duration, and creator of a portal, a level 20 fighter with absolutley 0 training in portals or arcana in general automatically helps the skill check.
Ever watch the show Eureeka? It's a lot like when the non-science savvy Sheriff encounters some high-tech science concept, comes up with a really crude theory of very limited understanding, and then one of the brilliant scientists (usually Henry) lights up spouts off some pseudo science theory filled with techno babble idea that was inspired by the sheriff's statement.

Or maybe it's like Buffy and the Vampire, where the librarian Giles is searching through his tomes of knowledge, trying to find information on some demon, and Xanders thumbs through some page and find the entry by random chance.
Fighter: "Hey, is this that magical dowizee thing you were looking up?"
Or maybe it's something more mundane...
Fighter: "Is there anything I can do to help?"
Wizard: "Help!? Did you spend a decade in apprenticeship, frequently being nothing more than a housekeeper, looking after some miserable curmudgeon conjurer in order to glean the occasional arcane secrets he was willing to dispense!? I didn't think so! I sincerely doubt you are equipped with the knowledge to help me! Further more... Ah... gods, this sun is so bright! It is making it difficult for these old eyes to see!"
Fighter: "Here, better?" *Shades the wizards eyes with the shadow of his shield*
Wizard: "Why... as a matter of fact, that actually is a little better... Oh... this passage, I almost missed it... I think I've done it! Ah-ha! See, I told you I could do it on my own"
Maybe you just need the right narrative. ;-)
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