What is the historical origin of 5e plate-based armors?

This question came to mind when I was searching for historical examples of "half-plate" and found the term conspicuously missing from reliable sources. As far as I can tell, "half-plate" seems to be a term coined for use in fantasy and role-playing game settings.

Similarly, I’m somewhat confused about how a "breastplate" came to describe an entire category of armor when, so far as I know, breastplates are usually nothing more than components in larger suits of armor.

So, I’m curious to see if there’s any information on the origin of plate-based armors in D&D 5e, such as:

  • historical examples which may have inspired these armor classifications
  • pop culture or previous editions of D&D which may have influenced the development of these armor classifications

For the purpose of this question "plate-based armors" means the breastplate, half-plate, and plate armor in D&D Fifth Edition.

I should also clarify that I’m not interested in discussion on leather armor and chain mail (on its own), as there’s already a slew of information (and controversy) on the historical origins of these armors.

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?

What is the origin of Faerun’s languages?

I’m not a D&D pro but I’m writing a thesis about how Tolkien created his languages and which was/is their following influence.

A friend of mine told me that the languages of Faerun are inspired by Tolkien, isn’t it?

I would like to find something technical about the origins of Faerun languages.

Have you got any suggestions? What is the origin of Faerun’s languages?

[Just to be clear: how inventors developed the languages, on which basis]

What is the point of origin for a square area of effect?

The spellcasting rules for areas of effect state:

A spell’s description specifies its area of effect, which typically has one of five different shapes: cone, cube, cylinder, line, or sphere. Every area of effect has a point of origin, a location from which the spell’s energy erupts. The rules for each shape specify how you position its point of origin. Typically, a point of origin is a point in space, but some spells have an area whose origin is a creature or an object.

A spell’s effect expands in straight lines from the point of origin. If no unblocked straight line extends from the point of origin to a location within the area of effect, that location isn’t included in the spell’s area. To block one of these imaginary lines, an obstruction must provide total cover.

Notably, square is not one of the shapes defined, yet there exist several spells which have a square area of effect, such as entangle or Evard’s black tentacles.

The spell grease tells us in its description:

Slick grease covers the ground in a 10-foot square centered on a point within range.

But this clarification is not present in the descriptions of entangle and Evard’s black tentacles.

So what is the point of origin of a square area of effect when it is not specified in the spell description?

Is there a limit on the number of Proficiency Swaps as part of Customizing Your Origin in Tasha’s?

Tasha’s has a section on replacing proficiencies granted by race in the section on customizing your origin and provides the example of swapping elven proficiency with a longbow for a tool proficiency. Does that mean you could swap all 4 weapon proficiencies from Elven Weapon Training for any 4 weapons or 4 tool proficiencies instead?

Origin of “Cookie” in Computing?

"Cookies" are a user-facing computing construct. They are codified in many technical specifications, including the earliest reference in an HTTP spec, RFC 2109, published February 1997.

Many claim the use in HTTP followed from UNIX "magic cookies." Eric Raymond provided a definition of what a "magic cookie" is:

Something passed between routines or programs that enables the receiver to perform some operation; a capability ticket or opaque identifier […]

OK.

But why did the UNIX community start using the phrase "cookie" to begin with? Is it because you put cookies into a jar, and take them out? When did this whole thing begin? Does anyone have a citation of the first usage?

What is the origin of the Leadership concept in D&D?

In 3.5 D&D there is a Leadership Feat. It allows you to gain a cohort and some followers, a whole bunch of followers if your score is high enough.

But, what is the origin of this Leadership concept in D&D, where did this idea of leading a whole group of people come from, and why is this even an option given that most games seem to revolve around only the player characters rather than characters + groupies? That would be a whole lot of people to keep track of if every player character was a leader!

I would like to know about the background and history of this concept in D&D, or is it new to the 3.5 edition?

Cross-Site Request Forgery from another origin

I’m trying to solve one of the challange of owasp juice shop. After some attempts, I started looking for a solution (this) and it’s exactly what I did, but it doesn’t work.

I’m running on a local docker the app (tried also online, but same problem).

On the console I get

Uncaught DOMException: Permission denied to access property "document" on cross-origin object

and it’s ok since that’s what I’m expecting to see, but when I go in the user profile the username didn’t change. In the network panel of the console I can see the packet being send (for the SOP I can’t see the response), so I don’t know what the problem can be.

What I’m doing wrong?Is my understanding of the attack wrong or is just a problem with the implementation of the webapp?