1. Should rigidity be measured?
2. Can rigidity be measured?
3. Is rigidity being measured?
If there is logical inconsistency between 1-3, how might this be resolved?
1. Yes.
2. Yes. Possibly @Rosseforp could devise a method or the BOSC way with @Dovo1695 and his sawed off syringe soap hardness tester... thing.
3. No.
We would need a volunteer...
Oh, by the way. Great way to up your post count!