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3 votes

Can space be both Euclidean and non-Euclidean, "at the same time"?

As a great statistician once said: “All models are wrong, but some are useful.” Euclidean Geometry is a way of approximating reality. It is useful under some circumstances and unhelpful in others. Any ...
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0 votes

Can space be both Euclidean and non-Euclidean, "at the same time"?

I’d turn to Sellars. I think upon learning about Gallilean Relativity my manifest image changed. (Before, my thought experiments violated physics!) What Conifold said about local geometry only ...
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1 vote

Can space be both Euclidean and non-Euclidean, "at the same time"?

Photons do always travel in straight lines - but across curved space. Closed curvature spaces can be embedded in Euclidean spaces. Open curvature spaces, 'saddle shaped' ones, cannot. Remember as well ...
  • 11.6k
0 votes

Can space be both Euclidean and non-Euclidean, "at the same time"?

The universe is this way, already. Far away from any gravitational influences, space is locally flat. Close to a strong gravity field, it is significantly curved. Note also that a space which is ...
1 vote

Book recommendation for physical philosophy?

Relational Mechanics and Implementation of Mach's Principle with Weber's Gravitational Force by André K. T. Assis is a good combination of physics with the history and philosophy of physics.
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1 vote

What are some examples of math that does *not* apply to the real world?

The imaginary quantity i is used extensively in mathematics although it is known there is no square root of -1. The science of complex arithmetic derives from the assumption that it does exist, and it ...
0 votes

What are some examples of math that does *not* apply to the real world?

There are several different kinds of thing that could fit that description, though of course as our scientific knowledge advances, matters could change. There are mathematical theories that apply only ...
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3 votes

What are some examples of math that does *not* apply to the real world?

Well-known examples of mathematical constructs that do not describe the real world (though they were intended to) would be the particle model called SU(5), Kaluza-Klein theory, Nordstrom's model of ...
0 votes

What did Popper think of the "Many Worlds" interpretation of Quantum Mechanics?

I think you need to read Quantum Theory and the Schism in Physics, one of the three volumes of Popper’s 'Postscript to the Logic of Scientific Discovery'. You should also look at Popper's Experiment. ...
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1 vote

What did Popper think of the "Many Worlds" interpretation of Quantum Mechanics?

Popper criticised the MWI in "Quantum Theory and the Schism in Physics" in section 5 of the introduction. He claimed that the MWI violates conservation laws. He also claimed that since ...
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0 votes

How touch occurs in a simulation hypothesis or in a brain hypothesis in a vat?

There are some principles of touch that are not so evident. a) All solids, even those that seem absolutely rigid like glass or diamond, act like a beach ball during the kick in the proximity of ...
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1 vote

Is human thought itself a fundamental force?

No, human action is not another fundamental force. Human actions are just regular kinetic forces produced by the muscles. I think you might be approaching the question of what causes human actions. ...
2 votes

Causality and Modal concepts

Clearly this is a complicated question and don't think there is widespread agreement about it in philosophy. My own take is that we should think of language that picks out entities in possible worlds ...
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