0 According to 01i 00Webster's Third New International Dictionary02i 00: 02br 02br 00"In American usage printers usually place a period or comma inside closing quotation marks whether it belongs logically to the quoted matter or to the whole sentence or context.... 02b 02br 02br 00Here is an instance when the commas and the period should be outside of the quotation marks: 02br 02br 01b 00In first-order theories in which equality is definable, we can define a special type of existential quantifier "(E! 01i 00x02i 00)A", which means intuitively "there is one and only one 01i 00x02i 00 such that A", or simply "there is a unique 01i 00x02i 00 such that A".
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