see ambiguous grammar.

Conversely, a sentence like "He ate the cookies on the couch" is also semantically ambiguous. Rarely, but occasionally, the different parsings of a syntactically ambiguous phrase result in the same meaning. For example, the command "Cook, cook!" can be parsed as "Cook (noun of address), cook (imperative verb form)!", but also as "Cook (imperative verb form), cook (noun of address)!" It is more common that a syntactically unambiguous