you don't have to be sad to be un happy...just like you don't have to cry to be sad...just because i don't hate someone, doesn't mean I like them...etc...
edit: synonyms can have diff connotations...for example, shack, lodge, house, mansion...all mean roughly the same thing, but they have different connotations...
What kind of stuff should the Us spend money on here instead of wars, other countries?