I see a lot of people refer to aerials having priority in talking about someone's moves having high priority. And then there are other people who say that aerials don't have any priority; it's just a matter of timing. Which is it? Do Aerials have priority, or not? I'd just like to get a straight answer, since I hear both sides a lot, yet no debate on it.
The problem is mixed uses of the word "priority". There is no true, formal definition of the word, in the context of Brawl. Moves don't have intrinsic "priority numbers" that determine if one attack "beats" another.
Some interactions of hitboxes are resolved based on the amount of damage they are each capable of causing, but aside from that, priority is a
perception, composed of a myriad of factors.
As Terios pointed out,
most aerials have "transcendant priority", which means that overlapping an aerial hitbox against an opponent hitbox (of any type), the aerial is unaffected. Although, the opposing attack might not be; ex. Sonic's Fair can "beat" Zelda's fireball. However, this is not true of all aerials; Olimar's Pikmin are treated in some sense as projectiles, and can clash against opposing attacks.
Also there are some exceptional cases where things are just strange. Snake's mortar (as it rises and falls) can't be destroyed by any of MK's aerials, nor Ness' Fair, Charizard's Fair, or many other slashy or energy-ish attacks. But it seems kinda inconsistent.
Anyway sorry for boring details, ppl use the term "priority" to mean the speed with which hitboxes come out as well as their disjointedness, basically a relative impression of how often an attack lands instead of the opponent's, which usually comes down to just overlapping their hurtbox before yours does. But some clashes cause interesting dynamics as well which are related.
Hope that helps o_O
Can someone explain why HDTVs/Widescreens lag?

and is there anyway to fix it?
I've known that they lag for awhile and I'd like to know why and if there is anyway to fix it b4
I just go out and buy a regular TV
I've heard that this lag is very minimal and/or nonexistent on
modern HDTVs. If I understand correctly, the lag is because, while analog TVs are just shooting the incoming signal to the TV screen as it comes (albeit in interlaced fields, at a specific frequency down the screen)... with LCD TVs afaik it has to buffer a whole field into memory, then sometimes apply effects (colourizing and w/e else), then redraw all the pixels (all at once). I think it's the buffering and effects / "processing" part that gave LCDs the bad rep, since the pixels shouldn't be noticeably lagging I don't think... and afaik this is why most new TVs even have a "game mode" in their display options that tells it not to do any of the image processing to eliminate potential lag.
I'm no TV expert tho...