One AI concept a day, explained in plain language — no maths degree required.

Today · Day 004What a Matmul Actually CostsA matrix multiply pays two bills at once, one in arithmetic and one in memory traffic. The arithmetic depends only on three integers. The memory usually decides the clock.BeginnerRead ▶

Earlier

  1. 003How to Split Your Data Without Lying to YourselfA cross-validation score is a promise about a future you have not seen. The split decides which future, and the quiet ways it goes wrong all break one rule.Beginner
  2. 002The Word Everyone Uses Is Worth NothingCount the words in each message, throw away the order, then charge a word less the more often it appears elsewhere. That two-line idea from 1972 is still the baseline neural search struggles to beat.Beginner
  3. 001The Machine That Only Asks Yes or NoA decision tree learns by asking one simple yes-or-no question at a time. It is the oldest idea in machine learning, and still the hardest thing to beat when your data lives in a spreadsheet.Beginner