How far would a Boom gun propel a Glitter Boy if the jetpack and anchors were disabled?

The Palladium Rifts Glitter Boy Boom gun accelerates a flechette round of ammo at over Mach One. Normally, laser tipped anchors from the legs drill into the ground and a jetpack provides counter thrust to offset the recoil.

If both of these safety mechanisms were disabled, how far would the gun propel the Glitter Boy power armor in earth normal gravity at one atmosphere pressure?

A player wants to use a prepared action to "offensively dodge" an anticipated enemy action.

Do spell targets know they were targeted if they make their saves?

A lot of spells in D&D 5e either work or they don’t, with no visual or audio effect. If your target cant see or hear that you are casting a spell, and they make their save for that spell… do they know that they were targeted? Do they "feel" it?

I ask because it seems that the only thing that counts as an attack in 5e is something with an attack roll. If that’s the case a lot of shenanigan’s can happen, with players claiming their spell meant to immobilize or even kill a foe, was not an attack and should not have provoked the target.
Is there an "official" way to handle it?

What kinds of Metallic Dragons were ever shown in D&D products? [closed]

Everyone knows the iconic metallic dragons that come in almost every single core monster book, Gold, Silver, Bronze, Copper, Brass. Let’s call those the “core five”

There were some others, like dunno Steel, Iron, Platinum, Electrum, Uranium(?), and what else…

What kinds of metallic dragons other than the “core five” were shown in D&D products?
What were their ecologies and demeanors?
In what worlds did they debut/existed?

Were Gebbeth the / an origin of Intellect Devourers?

On this blog, a response posting from one Michael Rooney makes the claim (05/10/2019)

[The nature of the Intellect Devourer] was reshaped by Dave Trampier’s art. If you read the original description (in the little brown books—most of which is the same as the 1e MM’s), there’s nothing about it looking like a brain, only the legs are described. That’s because the original monster is an emulation of the gebbeth in LeGuin’s A Wizard of Earthsea: a taloned, faceless thing that possesses its victims’ bodies. Interestingly, LeGuin got the idea for a gebbeth after looking at a microscopic tardigrade (the water bear), with its hook-like legs and no head.

Apart from this quote (and another citing it), I haven’t found any references on the internet connecting Intellect Devourers to gebbeth, and I haven’t read Earthsea.

Does anyone have a source confirming or refuting this?

Related: Do Intellect Devourers need to Eat?
Related: Were Illithids inspired by Cthulu?

Why were there two ongoing D&D magazines, and what distinguished them?

D&D has over its history been accompanied by two core supplemental magazines:

  • Dragon magazine, starting in March 1975.
  • Dungeon magazine, starting in September/October 1986.

Both went on hiatus in December 2013, Dragon pausing at issue 450 and Dungeon at issue 221, enjoying an impressive lifetime of 38 and 27 years respectively. (Dragon was later reincarnated in the form of “Dragon+”.)

Something’s always nagged at me me: why were there two magazines, and what was different about them?

What had them start up Dungeon magazine, and also keep it around for so long? What was different about them such that they didn’t just publish more Dragon issues? Was there some substantial characteristic difference in their content, release schedules, etc? Were there substantial market pressures which had them continue two side-by-side magazines instead of just the one?

Was it just “we’d like to sell more magazines, and our game has a second word in it we can use”, or was there far more to it than that?

What does GoDaddy do with their expiring domains that were registered before 2005?

In, GoDaddy say:

If a domain name registered with us after May 2, 2005 expires, we automatically list it for auction on GoDaddy Auctions® 25 days later. You can bid on any expiring domain name listed at GoDaddy Auctions.

They don’t explain what happens with domains registered before 2005. Does anyone have experience with this?

What were the names of the colored bolt spells of old D&D?

I remember hearing from people who played old D&D about a group of spells that were effective at destroying whatever they were aimed at. I think they were called something like black bolt, green bolt, and blue bolt, and they were pretty much the DMs tool for scaring the players… Or the epic players’ tool for scaring the GM. Does anyone know what I’m taking about?

What were the shortcomings of Robinson’s resolution procedure?

Paulson et alii. From LCF to Isabelle/HOL say:

Resolution for first-order logic, complete in principle but frequently disappointing in practice.

I think complete means they can proof any true formula in first-order logic correct. In the Handbook of Automated Reasoning I find:

Resolution is a refutationally complete theorem proving method: a contradiction (i.e., the empty clause) can be deduced from any unsatisfiable set of clauses.

From Wikipedia:

Attempting to prove a satisfiable first-order formula as unsatisfiable may result in a nonterminating computation

Why is that disappointing?

Multiple clients sites were de-indexed from yahoo/bing – what is going on?

In the last few days I have had multiple client sites de-indexed from yahoo/bing and there seems to be no rhyme or reason to it. Some sites were done completely white hat and others were black hat sites with completely different themes, owners and linking strategies done. Has anyone else had their site de-indexed from yahoo/bing recently? If so please post the details here so we can figure out what is going on.