Your team members have discussed a subject to death without reaching consensus. Break the deadlock by “polling” team members. Polling allows team members to cast a nonbinding vote based on the information they have so far.
Say: “We’ve been going over these same few points for more than 45 minutes. Let’s take a quick vote and see what everyone would do if we had to make the decision right now. If we agree, we’ll move on to the next agenda item. If not, we’ll keep talking.”
If members resume their bickering, say: “Yes, you made that point earlier. But if we had to come up with a solution today, how would you cast your vote?”