According to another theory, Genpaku did not want to see Ryotaku who were the most familiar with Dutch punished by bakufu (Japanese feudal government headed by a shogun) that was frowning on Western studies and took his frustration about the translation into consideration.
また一説としては、蘭学に対する幕府の対応が微妙でもあったため、万が一の際に、最も蘭語に通ずる良沢に咎が及ぶのを避けるためと、前説の訳の不備に対する良沢の気持ちを杉田が酌み取ったためともされている。