There are some basic errors, too, which are in the overarching structure of linguistic categories. For instance, 'and' is _not_ a preposition, as it states that

There are some basic errors, too, which are in the overarching structure of linguistic categories. For instance, 'and' is _not_ a preposition, as it states that it is in the language grammar sections. Perhaps this is a curmudgeonly and pedantic observation, but linguists be linguists.