What's true about time's arrow
8
325Ṁ2263000
60%
Different observers may have time's arrows pointing in different directions
48%
Anthropic selection: observers necessarily find themselves in regions with increasing entropy
47%
The arrow reflects brute initial conditions; there is no deeper explanation to be had
41%
Gravitational instability and cosmological expansion generate the observed thermodynamic arrow
41%
Growth of quantum entanglement under unitary dynamics explains thermodynamic irreversibility
35%
Inflationary cosmology dynamically selects special low-entropy initial conditions, explaining the arrow
34%
Entropy increase is emergent from coarse-graining and typicality; no deeper micro-physical asymmetry is needed
34%
Time’s arrow arises from asymmetric boundary conditions at both temporal ends (two-time boundary conditions)
34%
Landauer’s principle and information-erasure costs make entropy increase a consequence of information processing constraints
33%
The Past Hypothesis is a fundamental lawlike assumption, and a low-entropy beginning fixes the arrow
30%
Computational irreversibility and algorithmic complexity growth are the deeper source of the arrow
25%
Objective quantum-collapse dynamics are time-directed (e.g., GRW), grounding macroscopic irreversibility
25%
Penrose’s Weyl curvature hypothesis: near-vanishing initial Weyl curvature sets the gravitational arrow
Is there a deeper explanation for why we tend to see entropy increase? Is there a deeper explanation for the second law of thermodynamics?
A proposition resolves when there is widespread scientific consensus about it.
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