- "Pre-history" is actually not just what happened a really really long time ago but is specifically the time prior to the written recording of events.1 (I'm paraphrasing.) Presumably this is something she is studying in school.
- If you take away the "s" from "shampoo", you get "hampoo", which is too say, "ham poo". (Or alternately, if you take away the "h", you get "sampoo", or "Sam poo".) Presumably this is not something she is studying in school.
1 Hmm, "history" is one of those overloaded words: both "the stuff that happened in the past" and "the documenting and studying of the stuff that happened in the past". I'd never really pondered that distinction before.