The most likely source of discrepancy is the reporting of a mix of isomers in the literature, where it is not uncommon to only report the major or desired isomer. While there is no ideal way to deal with this issue, we can get a rough estimate of the effect by assigning the mix predictions to the observed regioisomer. For example, a mix is predicted for 873 reactions using the neutral pathway in cases were the reported outcome was β and if this amount is added to the 1,860 correct β predictions the accuracy of this "not α" prediction increases to 93 %. Similarly, the accuracy of the "not β" prediction for the cationic path increases to 63 %.