You have learned more than you think. The trouble is that most of it is already gone.
This is not a character flaw. In 1885 a psychologist named Hermann Ebbinghaus memorized long lists of nonsense syllables and measured how quickly he lost them. The pattern he found is now called the forgetting curve, and it is unkind. Within a day, most of what you learn has slipped away. Within a week, almost all of it.
It happens to everyone, with everything. The vocabulary from the language course. The names from the new job. The chapter you read so carefully last month. Your brain is not a hard drive. It is constantly deciding what to keep, and by default it keeps very little.
But Ebbinghaus found the way out too. Every time you recall something just as you are about to forget it, the memory grows stronger and fades more slowly the next time. Space those reviews correctly and the curve flattens until the knowledge simply stays.
That technique is called spaced repetition, and it is the closest thing learning science has to a cheat code. The only catch is the timing. Doing it by hand, across hundreds of facts, is tedious enough that almost nobody keeps it up.
That is the part we decided to automate. More on how, soon.