Boltzmann Machine
Software / App
An alternative algorithm based on the concept Jeff Hinton was pursuing concurrently with backpropagation, published in 1985, which turned out to be less effective at the time.
Mentioned in 3 videos
Videos Mentioning Boltzmann Machine

Jay McClelland: Neural Networks and the Emergence of Cognition | Lex Fridman Podcast #222
Lex Fridman
An alternative algorithm based on the concept Jeff Hinton was pursuing concurrently with backpropagation, published in 1985, which turned out to be less effective at the time.

Joscha Bach: Artificial Consciousness and the Nature of Reality | Lex Fridman Podcast #101
Lex Fridman
An early connectionist model in computer science, used to explore how models are formed by parameters and constraints. It struggles with complexity.

Michael Littman: Reinforcement Learning and the Future of AI | Lex Fridman Podcast #144
Lex Fridman
An early neural network model that could learn non-linear concepts, solving the XOR problem that perceptrons couldn't.