I can get this to work and in my head it should :)
I want an "In Spec" IF… the Stage 1 Temp Verification is less than or equal to S1 Temp minus 5 AND Stage 1 Temp Verification is great than or equal to S1 Temp plus 5.
=If([Stage 1 Temp Verification]@row) <=([S1: Temp]@row + 5), ([Stage 1 Temp Verification]@row) >= ([S1: Temp]@row - 5), "In Spec", "Out of Spec"))