Spaced repetition software is designed to maximise absolute throughput. That is, maximise the quantity items-remembered/year. The way it does this is to open a

Spaced repetition software is designed to maximise absolute throughput. That is, maximise the quantity items-remembered/year. The way it does this is to open a firehose at your memory. If the information is simple and well presented, then ideally about 90-95% of it will stick. If you want to retain 1000s of items (like a foreign language) and can accept some amount of loss, then spaced repetition is effective. But it's not designed to increase the relative chance that any individual item will be remembered. If you want to learn a small number of items with 100% recall, then spaced repetition is a bad way of doing that. https://www.supermemo.com/help/fi.htm https://www.supermemo.com/help/fi.htm