Nonsingular Bounce Explanatory Companion: What a Cosmic Bounce Could Tell Us About Origins

This perspective essay examines what nonsingular bounce cosmology could reveal about cosmic origins. Building on a proposed framework for testing bounce models through JWST galaxy abundances, it distinguishes evidence for an earlier contracting phase from stronger claims about an eternal universe or an ultimate beginning. Without mathematical formalism, it explores cosmic memory, competing explanations, the arrow of time, and the limits of reconstructing cosmic history from observations. It argues that a bounce could extend physical explanation beyond the hot Big Bang while leaving deeper questions about initial conditions, physical laws, and existence unresolved. No new numerical results or detection of a cosmological bounce are claimed.