It's worth noting that Doyle also has Holmes express ignorance of the Copernican model of the solar system and of popular intellectual figures of the time. Sure, this is probably just lampshading any mistakes Doyle-the-writer might make when Holmes-the-character gets something wrong, but when Watson expresses incredulity at this ignorance, suggesting that Holmes' worldliness surely exposed him to such things, Holmes cheerfully replies that he only ever heeds that information, and that fidelity of information, which helps him solve cases.
For whatever it's worth, I don't think Inspector Lestrade would appreciate the difference, so Holmes needn't bother either.
For whatever it's worth, I don't think Inspector Lestrade would appreciate the difference, so Holmes needn't bother either.