Keep pulling the thread on Blaise Agüera y Arcas.
In the BFF artificial life experiment, the system undergoes a phase transition from a low-computation state to a high-computation "life" state after approximately 6 million interactions.
The emergence of complex, self-replicating programs in the BFF artificial life experiment occurs even when the mutation rate is set to zero.
The speaker proposes that symbiogenesis, the fusion of smaller replicators, is the primary source of novelty and complexification in evolution, a view that expands on the work of Lynn Margulis.
The phase transition to life observed in the BFF experiment is a gelation event, which can be mathematically modeled by a generalization of the Smoluchowski coagulation equations.
Experiments show that symbiogenesis is necessary for complexification in the BFF system, as blocking the formation of replicators with an ancestry tree depth of 20 or more prevents the phase transition to life.
John von Neumann's key insight was that a universal constructor is functionally equivalent to a universal Turing machine, which implies that life is a form of embodied computation.
The speaker's artificial life experiment, named BFF, uses a modified version of the Brainfuck programming language with seven instructions instead of the original eight to enable embodied computation.
During the phase transition in the BFF experiment, the average number of operations per interaction increases from approximately 2 to 1,374.
In the BFF experiment, fully self-contained "cellular" replicators emerge through the symbiogenesis of more primitive "inanimate" and "viral" replicators.
A complete mathematical model of evolution should include both a Lotka-Volterra-type term for Darwinian population dynamics and a Smolchowski-type term for symbiogenetic events.
The speaker argues that symbiogenesis, not random mutation, provides evolution with its arrow of time toward greater complexity.
The speaker contends that evolution is "symbiogenesis all the way down" and not limited to the 8 or 12 major transitions proposed by Eörs Szathmáry and John Maynard Smith.