Muramasa
Best Girl
Or Sasa's dead, or she doesn't exist in this timeline, or she's managed to luck into an anti-scrying effect this time, or it doesn't work when we're in timestop and the target isn't, or Feathers is hanging out with her, or we can only track meguca and she's uncontracted, or we can only track people we've met, or it's a Moriya Shrine conspiracy, or Yukari is fooling around again.
It'd be pretty easy to prove that we can't track anyone ever by trying to track someone who definitely has no mitigating factors and failing. We haven't done that yet.
I'm not saying we need to keep doing science right now, I'm saying if you want to win that bet science is going to have to happen at some point.
Can I ask you something? Where do you see us continuing to work on the compass idea leading to us finding Sasa and other magical girls sooner then had we just begun our search from this update onward?