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philosophy of science

The Physics of Fine-Tuning

Evidence in the Multiverse

Erik Curiel and Simon Friederich hash out the problems we encounter when we look for evidence of a multiverse.
The Physics of Fine-Tuning

The Hard Fact of Life in Big Physics City

How similar is the fine-tuning of our universe to probabilistic reasoning we use and understand? Simon Friederich and Erik Curiel go through a series of examples.
The Physics of Fine-Tuning

Stability and Probability

Erik Curiel and Simon Friederich discuss how reasoning in cosmology sometimes conflates topological stability with probability, and why that might be wrong.
The Physics of Fine-Tuning

Problems with Probability

Simon Friederich and Erik Curiel discuss the problems fine-tuning arguments raise for our understanding of probability.
The Physics of Fine-Tuning

Inflation in the Future

What should we expect to learn in the future? In the fourth part of their chat, Dave Sloan and Robert Brandenberger talk about how we expect inflationary theory to develop, and how observations may lead to new physics in this area.
The Physics of Fine-Tuning

Strings, Inflation, and Alternatives

In the third part of their discussion, Dave Sloan and Robert Brandenberger explain the relationship between string theory and inflationary models. Can inflation arise from particle physics, or do we need to look for alternative models?
The Physics of Fine-Tuning

Inflation Predicts

In the second part of their discussion, Dave Sloan and Robert Brandenberger tell us what inflation predicts and whether inflation itself seems fine-tuned. This discussion was conducted at the University of Oxford on March 14, 2017.
The Physics of Fine-Tuning

Evidence For Inflation

In the first part of their discussion, Dave Sloan and Robert Brandenberger go over our evidence for inflationary theories and discuss how inflationary models improve on the hot big bang.
The Physics of Fine-Tuning

Panel on Inflation

Professor Joe Silk talks with Professor Robert Brandenberger, Professor Jerome Martin, and Dr. Dave Sloan about the current state of research and controversies surrounding inflation.
The Physics of Fine-Tuning

Does Inflationary Cosmology Solve Fine-Tuning Problems?

Professor Robert Brandenberger (McGill) argues that inflationary models still face considerable challenges.
The Physics of Fine-Tuning

Inflationary Attractors

Dr David Sloan (Oxford) discusses the for inflation to occur given typical initial conditions. He argues that, on the right understanding of the background dynamics of the universe, inflationary conditions dominate.
The Physics of Fine-Tuning

Inflation After Planck

Professor Jerome Martin (Institut d’Astrophysique de Paris) explains the current state of evidence for inflationary models.
The Physics of Fine-Tuning

The Observer Strikes Back

What is an observer? In the fifth and final part of their discussion, Jim Hartle and Bernard Carr discuss the nature of observers.
The Physics of Fine-Tuning

No Boundaries for Quantum Cosmology

Where is the observer in the universe? In the fourth part of their discussion, Jim Hartle and Bernard Carr discuss Jim Hartle’s no-boundary proposal.
The Physics of Fine-Tuning

Physics and Philosophy

What are the limits of physics? In the third part of their discussion, Bernard Carr and Jim Hartle talk about the point at which physics ends and philosophy begins.
The Physics of Fine-Tuning

The Quantum and Cosmological Scales

How do we combine our theory of the very small with our theory of the largest scales of the universe? In the second part of their discussion, Jim Hartle and Bernard Carr hash out the connections between cosmology and quantum mechanics.
The Physics of Fine-Tuning

What Fine Tunings Are There?

Is the universe fine-tuned for life? In the first part of their discussion, Bernard Carr and Jim Hartle discuss how physical theories might contain unexplained assumptions that are necessary for the existence of life.
The Physics of Fine-Tuning

Dark Matter, Fine-Tuned

What surprising features of our theories cry out for explanation? Rocky Kolb and Rafael Alves Batista consider features of our theories that look unlikely or unnatural, and what our chances are for building a unified theory that explains them.
The Physics of Fine-Tuning

Why Now?

We’re at a particularly interesting time in the evolution of the universe. Rafael Alves Batista and Rocky Kolb chat about the interesting features of our time, and why we should--or should not--expect to be living now.
The Physics of Fine-Tuning

Dark Matter Particles

What sort of things could dark matter be, and how would we tell which it is? Rafael Alves Batista and Rocky Kolb review the main candidate dark matter particles, and consider our chances for telling which one is out there.

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