Re: Grammaticaly correct sentences (or not...)

Most points, conceded. I was about to concede the 'software' point
too, but Peter zoomed in with what turned out to be a rescue
operation! ( should that be hyphenated? I'm not sure - rescue
apparently seems to work as an adjectival.)
I had used 'decimate' in the figurative sense to mean 'to rip apart',
'to destroy' or 'to severely criticise'. Is this objected to? "My
nephew, having failed his matriculation, spends his time in systematic
decimation of the piscean population in the rivulets around his
village homestead" is a line I remember from a letter from an old
friend. Of course, here the sense was literal. (I wouldn't go so far
as to say he was an authority on UK English).

"Note that you never hear of lophenation" went right above my head.
(Almost like 'one flew over the cuckoo's head.) 'Was it supposed to be
loafenation?

Hyphenation question too is conceded, but, as something of curiosity
value, find a quote from the Cambridge Advanced Learners' Dictionary
below - I swear I didn't edit out the hyphen.

first class (adjective)
...............................
2 A first class degree is the best possible degree qualification you
can obtain from a British university.