Notes on the patterns we see in real student data — where reasoning breaks down, why mocks rarely surface it, and what changes when the specific decision step gets named.
You read the question. You recognise the concept. You've done problems like this before. And you still pick the wrong option. Here's what's actually happening.
More practice without pattern correction means the same mistakes keep recurring — just in different questions.
Mock scores tell you the result. They rarely tell you the pattern behind it.