Unknown unknowns. Knowledge availability is another big one. I used Anki to learn molecular biology. I work in bioinformatics and understanding molecular pathw

Unknown unknowns. Knowledge availability is another big one. I used Anki to learn molecular biology. I work in bioinformatics and understanding molecular pathways means I can more fluently build hypotheses with colleagues. Without having memorized these pathways, unknowns unknowns and lack of knowledge availability would prevent a lot of discovery.