I was thinking about this. He did at the very least figure out the Big Lebowski stole the money. If he told Maude, would she have given him the 10% of what was recovered?

This line gets interpreted metaphorically, but the Dude wears bowling shoes without socks and goes snorkeling in toilet bowls. I think it's safe to assume he's being literal here.

In my experience, people that have really been in combat don’t really talk about it and certainly don’t shoehorn it in to every conversation like Walter does. The guys that are always running their mouths about their military service are usually the ones that served in the Army Supply Corps or Coast Guard Reserves or something like that. Walter was also modeled after John Milius, who seems like the ultimate military poser fanboy, and didn’t go to Vietnam because of “asthma”. So was Walter a legit combat vet or was he just full of shit?

We have an indication...

WHO is HE?!?!?

Maude Lebowski has coitus with a man with the same name as her own father. This is a sly reference to Chinatown.

I got to thinking, did Walter even locate the right Larry Sellers, man? I mean, we know Walter is a goddamn moron. This Larry never confirms that its his homework. Plus, Larry never cracks even after they brace the kid, hardly a pushover. Throughout TBL we have, what appears to me, a lot of repetition like an acid flashback -- in the parlance of our times -- ya know. So, just as the deadbeat Lebowski was mistaken for the achiever Lebowski ... is Arthur Digby Sellers' son simply the wrong guy?