So the correct and polite answer would have been.
1) Swings that miss can proc DA
2) DA doesnt have 100% acc
No. Both of those are correct statments, but neither is an answer to the mistaken statements made, and each are so fundamental to the basics of how things work that there should be no reason to even bring them up when attempting to correct you.
Veg may have been right but being a dick isn't needed over a video game
There are certainly plenty of opportunities to be annoyed at needless flaming on these and other message boards, but Veg's post (in this particular case, anyway) is not one of them. His explanation didn't delve deeply into the mechanics of how things work, but I would guess that he assumes he shouldn't need to for such a basic concept as DA procs.
I go by the wiki and when there is no information or not enough, I just go by what I would assume makes the most sense
Well, this is a problem on your end, then (and wiki, to an extent), and it manifests in a large number of the posts you've made (I've had more than a few head-desk moments on reading your posts, but since they were usually mixed in with an entire thread of stupidity, I didn't feel like it was worth getting involved in). If you don't actually know how something works, you need to do more research, and/or ask questions for a better understanding. Your thread on exact haste values for gear was a simple and correct way to proceed.
Double Attack: On multi-hit weapon skills, Double Attack can process on any hit of the weapon skill. Note, however, that Double Attack cannot process to induce a weapon skill to attempt to hit more than 8 times.
Long ago there was speculation that DA could proc on any hit of a weaponskill. However a 3-DA TP return was never confirmed by anyone (testing with either Penta Thrust or Raging Rush).
For a 6 hit ws though, DA could fire on any of the 6 but as soon as its fired 2x, it wont attempt to fire for the remainder even if they miss and you only land say 5 hits (da da single)?
Further, if the chance a DA could proc was maintained across all hits until 2 procs were realized, then weaponskills with a high number of hits (eg: Penta, DE, etc) would have abnormally high levels of DA procs compared to lower-hit weaponskills, which is not the case.
While difficult to be absolutely certain, the current evidence points strongly against the statement made on the wiki. It is likely, however, that noone ever updated the wiki (I'm not going to try to figure out when that particular comment was added).
Triple Attack: On multi-hit weapon skills, (using Dual Wield) Triple Attack can occur twice (once on first hit and again on off hand hit).
This is also somewhat ambiguous (based on my knowledge). It's not certain that the second TA must come from the offhand weapon. It's known that you can only DA once on a 1-hit weaponskill (eg: Gekko), and that you can DA twice on a multi-hit weaponskill where you don't have an offhand weapon (eg: Raging Rush, Vorpal Blade, any H2H). However a single-hit weaponskill can DA twice if you're dual wielding (eg: Viper Bite).
As such I would say that you have one TA/DA attempt for the first hit, and one additional attempt if the weaponskill has any additional hits.