Phil Halper (aka Skydivephil) | The Sci-Phi Show: Hourglass Universe vs The Kalam Argument @PhilHalper1 | Uploaded April 2024 | Updated October 2024, 1 week ago.
Many contemporary models of the Big Bang from The Hartle Hawking model to Loop Quantum Cosmology to String Gas Comsology, the Janus Universe, Carroll Chen, Aguirre-Gratton, and CPT symmetric universe, can be interpreted as giving the universe an hourglass-like structure.

In this episode of the SciPhi Show, leading atheist philosophers Alex Malpass and Dan Linford examine what this might mean for the Kalam Cosmological Argument. In particular, we show that it faces an "interface dilemma" where defenders of the argument, like William Lane Craig, must give up one of the Kalam's fundamental premises.
For my videos on the early unvierse, see here:
youtube.com/watch?v=Ry_pILPr7B8&list=PLJ4zAUPI-qqqj2D8eSk7yoa4hnojoCR4m
For the Kalam, see here:
youtube.com/watch?v=pGKe6YzHiME&t=2798s
and here
youtube.com/watch?v=femxJFszbo8&t=761s
For Dan's paper, see here:
arxiv.org/abs/2006.08890
a timecode is below
0:00 Introduction
1:21 What is the Kalam?
3:11 Hourglass Universe
6:05 The Interface Dilema
14:55 The Metaculus
16:55 Causality
22:30 Simultaneous Causation
25:50 Theories of Time
44:07 Challenging the Causal Principle