The human error rate on this task is 4% (https://pdfs.semanticscholar.org/387e/7349b8e31e316c2a7380603d1b6c0b1417c8.pdf https://pdfs.semanticscholar.org/387e/73

The human error rate on this task is 4% (https://pdfs.semanticscholar.org/387e/7349b8e31e316c2a7380603d1b6c0b1417c8.pdf https://pdfs.semanticscholar.org/387e/7349b8e31e316c2a738060...). What is amazing is how consistently people overestimate human performance.