Anthropics and Myopics: Conditional Probabilities and the Cosmological Constant

TL;DR

This paper critically evaluates the anthropic reasoning behind the small observed value of the cosmological constant, emphasizing the limitations and assumptions involved in establishing correlations with life's existence.

Contribution

It clarifies the conditions under which anthropic arguments can be valid and highlights the subtlety of causal effects related to the cosmological constant.

Findings

Correlations between the cosmological constant and life are only demonstrable under restrictive assumptions.

Causal effects linking the cosmological constant to life are more complex and subtle than previously thought.

Anthropic explanations require careful consideration of underlying assumptions and correlations.

Abstract

We re-examine claims that anthropic arguments provide an explanation for the observed smallness of the cosmological constant, and argue that correlations between the cosmological constant value and the existence of life can be demonstrated only under restrictive assumptions. Causal effects are more subtle to uncover.