After Kat is injured, Ives says something to the effect of "where are you going to be able to find an inverter that existed 2 weeks ago?" But later, it is revealed that Ives' team has access to a large suite of inverters (which they use for the final operation). Why couldn't Ives just direct the Protagonist to one of those?
1 Answer
Presumably, the problem is the Protagonist couldn't know that the inverters existed yet. That would create a paradox where the Protagonist would potentially look for a way to use the inverters ahead of the final operation. Those inverters were also secret, as they were a key part of the final operation, which was the last chance at stopping the algorithm.
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At that point in the movie, the Protagonist was just told what inverters are and how they work. So what is the issue with using one that Ives' team controls? Commented Apr 5, 2021 at 18:49
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2The Protagonist knows about inverters, but he doesn't know about Ives's inverters. And those in particular are a secret weapon. It doesn't seem that Sator knew about those, or he would likely have made an attempt at sabotaging the final operation.– CarsonCommented Apr 6, 2021 at 13:56