Or statement when testing a list?

I'm writing this for a murder mystery game:
`{
- deductions ? (murder_victim_was_not_lady_duffy) && clues ? (jewellery_missing || sweet_christine):
~ clue_sets+=clue_set_true_murderer
}`

But the || is not working. The error message I get is "Can not call use '?' operation on List and Int". How can I perform a function based one having _at least one_ of an item in a list, but not necessarily having both the items in the list?