In hand 3, KsQs is impossible.

Hands 1 and 2 are standard, thought process and play alike.

Hand 3 is tricky but I agree that a fold is in order. Do you feel like it's +EV to avoid marginal situations like this one, even if there's a chance you're ahead? I feel that putting opponents on ranges/narrowing them down is wonderfully useful, but when we're flipping against a range that makes sense to us, doesn't it make sense that our estimated range is slightly incorrect, possibly shifting the EV of a call into the red?