Diesis and the Pythagorean Comma

Can you hear, that modern instruments violate the just intervals?
- If you never heard anything else, it may be difficult!
But if you can se that the green arms do not converge with the axisses 12 o' clock, 4 o' clock & 8 o' clock, and if you can see that the uppermost orange dot is not placed on the 12 o' clock axis, then why shouldn't you be able to hear it if you get the chance to compare?