The hyphen, the brackets, the colon, the ellipsis and the slash are also in use. Note that brackets clarify abbreviations and ellipsis marks omitted usage examples. Tacitus loves ellipsis of verbs and conjunctions. Auxiliary verbs can introduce verb phrase ellipsis, but main verbs cannot. See the article on verb phrase ellipsis for examples. There are numerous distinct types of ellipsis acknowledged in theoretical syntax. Examples include metaphor, simile, ellipsis, narrative motifs, and allegory. However, it is retained if the following ellipsis represents an omission between two complete sentences. An unbracketed ellipsis indicates an interruption or pause in speech. This optionality is a clear indication of ellipsis. There are many related uses of the ellipsis in set notation. The ellipsis by itself represents speechlessness, or a "pregnant pause". Note that ISO/IEC 8859 encoding series provides no code point for ellipsis. Stripping is also known as "bare argument ellipsis". Theories of binding, coordination, discontinuities, ellipsis, etc. must acknowledge and build on the distinction.