Common mistake
Believing the same notes always make the same scale
It sounds like this
“C major and A minor use exactly the same notes, so they're really the same scale.”
Why it’s wrong
Start from a different home note and the pattern of steps above it changes — including the third, which decides the colour.
The lesson that fixes it
Cognosc spots mistakes like this.
When you explain something in your own words, Cognosc can tell exactly which mistake you’re making — not just that you’re wrong — and gives you a short lesson to fix that one thing.