Originally posted by Lana
A single word used in an exclamatory manner is not grammatically incorrect.
Yes it is. If you still disagree read up.
http://en.wikipedia.org/wiki/Sentence_fragment#Classification_by_structure
Originally posted by Inspectah Deck
Yes it is. If you still disagree read up.http://en.wikipedia.org/wiki/Sentence_fragment#Classification_by_structure
Lana is referring to interjections, such as 'Oh!'. It doesn't strictly fit the definition of a sentence, but it's not really incorrect per se.