I must disagree with this- I would expect Ranma to be even a better
fighter. He would be lacking the grueling training his father gave him,
yes, yet he would have an even better teacher: the streets. He could
become a really great fighter by living on his own. After all, isn't the
current Ultimate Fighting Champion a guy who applied street-brawling to
Jujitsu? I'd expect him to have lots of fighting experience in all
areas, and be tough as hell.

	Well, My personal opinion is a mix.  On the one hand Ranma without Genma 
would lack the intense training in a formal martial art.  However one of the 
problems with that training is that Genma was constantly training Ranma to NOT 
use the weapon that made Ranma the most capable fighter in the series, his 
inteligence.
	If Ranma had no parents, well I can certainly see him remembering the 
lessons his father had taught him when he was younger, and he would then have 
gone on to improve on that base from lessons in other schools, and observations 
and fights.  This is actually the real point of Genma's training trip.  However 
instead of having Genma there pounding in his personal philosophy of combat into 
Ranma, it would just be Ranma analysing the various combat concepts and inovate 
ways of handling them.
	The real answer to how good Ranma would be is his attitude toward 
Martial arts.  The canonical Ranma tends to be a bit indiferant toward 
training(he has been doing it for ten years and he's probably sick of it) unless 
he's got some sort of motivation, like Genma or the humiliation of having been 
beaten.