[ohwellhere]

"Tau is transcendental. 0.5 isn't."

It's definitely a value judgment. But the value judgment is: Is the radius or the diameter more fundamental to a circle?

[BlueTemplar]

As the Tau manifesto points out, tau/4 = pi/2 = lambda is pretty fundamental too ! (The "orthogonality constant" ?)

[garbagecoder]

Geometry isn't the only application of pi. Nor is the geometric interpretation the only way to determine what is "fundamental."

Why not use Darians? http://proper-pi-manifesto.com