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Response to `Local and global definitions of time:Cosmology and quantum theory'
Local global definitions time Cosmology quantum theory
2016/6/15
I will discuss the notion of time and spatial finiteness from the perspective of observational cosmology. Our observed universe is well described at early times by small fluctuations in the spatial gr...
Local and global definitions of time:Cosmology and quantum theory
Cosmology relational time spatial extent time
2016/6/15
I will give a broad overview of what has become the standard paradigm in cosmology. I will describe the relational (\`{a} la Leibnitz) notion of time that is often used in cosmological calculations an...
Benefits of Objective Collapse Models for Cosmology and Quantum Gravity
Objective collapse Dynamical reduction Quantum gravity Cosmology
2016/6/15
We display a number of advantages of objective collapse theories for the resolution of long-standing problems in cosmology and quantum gravity. In particular, we examine applications of objective redu...
Non-standard Models and the Sociology of Cosmology
Cosmology Astrophysics Sociology Philosophy
2016/6/14
I review some theoretical ideas in cosmology different from the standard "Big Bang": the quasi-steady state model, the plasma cosmology model, non-cosmological redshifts, alternatives to non-baryonic ...
On Under-determination in Cosmology
under-determination the standard model of cosmology observationally indistinguishable spacetimes the cosmological principle the flatness problem the horizon problem
2016/6/12
I discuss how modern cosmology illustrates under-determination of theoretical hypotheses by data, in ways that are different from most philosophical discussions. I emphasize cosmology's concern with w...
Prediction and typicality in multiverse cosmology
Typicality anthropic principle multiverse cosmology dark matter
2016/6/12
In the absence of a fundamental theory that precisely predicts values for observable parameters, anthropic reasoning attempts to constrain probability distributions over those parameters in order to f...
The fundamental arrow of time in classical cosmology
Time Asymmetries Cosmology Cosmological Time Arrow
2016/5/31
The aim of this paper is to show that a new understanding of fundamentality (section 2), can be applied successfully in classical cosmology and is able to improve a fundamental understanding of cosmol...
Testability and Epistemic Shifts in Modern Cosmology
cosmology multiverse theory evaluation testability falsifiability demarcation criteria Popper
2016/5/30
During the last decade new developments in theoretical and speculative cosmology have reopened the old discussion of cosmology’s scientific status and the more general question of the demarcation betw...
“The most philosophically of all the sciences”:Karl Popper and physical cosmology
Karl Popper Hermann Bondi cosmology falsifiability demarcation steady state theory
2016/5/30
Problems of scientific cosmology only rarely occur in the works of Karl Popper. Nevertheless, it was a subject that interested him and which he occasionally commented on. What is more important, his g...
A probabilistic logic of induction is unable to separate cleanly neutral support from disfavoring evidence (or ignorance from disbelief). Thus, the use of probabilistic representations may introduce s...
Certain results of observational cosmology cast critical doubt on the foundations of standard cosmology but leave most cosmologists untroubled. Alternative cosmological models that differ from the Big...
Learning from a simulated universe: the limits of realistic modeling in astrophysics and cosmology.
Computers models and simulations Realism Cosmology
2008/4/22
As noticed recently by Winsberg (2003), how computer models and simulations get their epistemic credentials remains in need of epistemological scrutiny. My aim in this paper is to contribute to fill t...
Recent developments in cosmology indicate that every history having a nonzero probability is realized in infinitely many distinct regions of spacetime. Thus, it appears that the universe contains infi...
Self-Locating Belief in Big Worlds: Cosmology’s Missing Link to Observation
self-locating belief anthropic principle self-sampling assumption
2008/4/22
Current cosmological theories say that the world is so big that all possible observations are in fact made. But then, how can such theories be tested? What could count as negative evidence? To answer ...
Scientific cosmology is an empirical discipline whose objects of study are the large-scale properties of the universe. In this context, it is usual to call the direction of the expansion of the univer...