I found a seemingly similar bit of code from @ramza a few months back, that I believe can be adjusted to do what I'm hoping to accomplish:
Code:
var listofskills = [1,2,3,4,5,6,7,8,9]
var knownskills = []
for (var i = 0; i < listofskills.length; i++){
if (user.isLearnedSkill(listofskills[i])) knownskills.push(true)
}
if (knownskills.length >= 5){
value = true
} else {
value = false
}