Probabilistic Inference

Culinary choices

Suppose you are in a new city and looking to get dinner with friends. You pull out Google Maps to help with the decision. To make the process easier, you decide to look at the ratings: A nearby Cambodian restaurant boasts 4.8 stars, but the equally close Italian place is a close competitor at 4.6 stars, but has five times the number of reviews. Surely that must make a difference? You search for your scratchpad, promising to your friends that you got the situation.

Feb 10, 2024

Can random actions be optimal?

Is random behavior helpful in any situation? By definition, random actions are the most uninformed, and if any better is known should be suboptimal. Yet, the issue is more subtle. Reinforcement learning and game theory can be paradigms to reason about this.

Jan 27, 2024

Do auto-regressive models bite their own tail?

Autoregressive models use their output to arrive at predictions. In machine learning, this amounts to “training on the output”, i.e., generated data. More broadly, intelligent behavior is often accompanied by deep thought or even dreaming between actions. In both of these cases, the system is decoupled from the ground truth. Despite this apparent conundrum, there seems to be a benefit.

Dec 27, 2023

What is meta in meta-learning?

Meta-learning summarizes the concept of learning a more general framework to learn – hence the name. Yet, this concept subsumizes a range of multiple concepts, including transfer learning, few-shot learning, continual learning, and fine-tuning. We develop an abstracted framework that unifies these notions. This extends beyond parametric models.

Jun 3, 2023