Proof of an impossibility.
It gives us a new idea of constructing.
It clarifies our idea of constructing.
An idea getting clearer.
Impossibility of making coincide right &
left hand.
How does the ‘proof’ convince us
of the
impossibility?
As an experiment would?
Can't he still look for a construction of the trisection?
Certainly but the point of it has been removed for him.