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Love rocks

"Measurement, he [Poincaré] insists, is never of space itself, but always of empirically given physical objects in space, whether rigid rods or light rays. Regarding the structure of space as such, experiment can tell us nothing; it can tell us only of the relations that hold among material objects. Suppose, Poincaré says, a deviation from two right angles had occurred in the triangulation carried out by Gauss, would this necessarily have constituted a refutation of Euclidean geometry? For there would have been nothing to prevent us from continuing to use Euclidean geometry on the assumption that light rays are curved. Nothing could disprove such an assumption. What geometry one chooses is, for Poincaré, merely a matter of convenience, a convention."

• Max Jammer

"You live in this world; we build it."

• (redacted)

"You are a moment; we are a movement"

• (redacted)

What are these little guys

Rain frogs

"When you observe conflict, think Deadlock-the absence of mutual interest before puzzling over why a mutual interest was not realized."

• Kenneth Oye