This document discusses spoken grammar and the use of "heads" and "tails" in natural speech. Heads refer to placing important information at the beginning of a sentence, followed by the grammar, such as questions asking for clarification. Tails are often used to provide an evaluation after stating the subject. Some examples are provided showing how heads and tails change the meaning and flow of sentences compared to standard written grammar. Reasons for using heads and tails include placing important information first, making complex sentences easier to say, clarifying subjects using pronouns, and referring to shared or visible information.