Hi!  I'm trying out Ada Lovelace Saves Christmas, and I'd like to check on a rule:

When there are multiple pieces of evidence in a skill box (like the slingshot/keys/card/gem or meeple/perfume), which is correct?

• they ALL need to be filled out to invoke the skill once
• invoke the skill once each time a single piece of evidence's boxes have appropriate numbers

I'm guessing they allow multiple skill-invocations, but I'd like to make sure.