Recent comments in /f/explainlikeimfive

DeHackEd t1_j6oqaxs wrote

A router's job is to find a subnet match in its list of routes, and forward data to that destination. It does this at the binary level. In hardware routers, there's a lookup table that has 3 types of "bits": match 0, match 1, and don't care (X). In particular the don't-care bits must be at the right-most edge and grouped.

Your first /26 is, in the router's table as a 32 bit prefix:

00001010 00000000 00000000 00XXXXXX
     (10)   (0)     (0)     (0-63 range)

The tolerable range of bits is:

00001010 00000000 00000000 00000000
   to
00001010 00000000 00000000 00111111

(When writing a subnet, you always have the don't-care bits as 0, and most software will assume that if you set any of them to 1, it's a mistake to be pointed out)

This means the subnet MUST be split along a binary point. So you 10.0.0.64 through 10.0.1.63 subnet (which is actually the size of a /24) doesn't work because the numerical range is:

00001010 00000000 00000000 01000000 (10.0.0.64)
   to
00001010 00000000 00000001 00111111 (10.0.1.63)

Can't put in "don't care" bits to get the coverage you want.

1

quequotion t1_j6oq1qy wrote

It used to be a secret, and apparently various military R&D happened there--particularly of aircraft, which were also secret.

The surrounding area became a hotbed of UFO sightings, some of which were sightings of actual aircraft.

This fueled conspiracy theories, such as that the wreckage and survivors or bodies from the Roswell incident had been taken there for study or storage.

These conspiracy theories experienced a resurgence in the 90s due to the X-Files, but I am not sure what revived the momentum that led to the pathetic 2010s "raid".

7

muwave t1_j6opyzl wrote

You could change your netmask to /22 giving you 4 subnets and 1022 hosts in each, or /23 with 2 subnets of 510 hosts each.

1

Firefly_officer t1_j6opym1 wrote

A Congressional appropriations bill in the late 1980s had it listed as receiving a suspicious amount of poorly defined ( dark) money. Thats is about it. Everyone who reads Janes knew it was Nellis AFB Groom lake test area S4 for the USAF, which in itself is plenty super exciting, again, if you the type to read Janes. Wright Pat has the Alien bodies and Redstone arsenal has the space ships either way.

0

flyingbarnswallow t1_j6opvgx wrote

Chomsky’s main idea is that while human language is produced linearly (that is, one word after another), it has a deep structure that is instead hierarchical. The full set of rules governing where different parts of speech can go in this hierarchy is waaaay too long for a Reddit comment (and I doubt I could explain it well since it’s been a few years since I really took syntax).

I believe the highest level in this sentence is a VP (Verb Phrase), although I think one might argue it’s a TP (Tensed Phrase) idk, I’m not a syntactician. A VP can take an internal argument (object, for English verbs), but isn’t required to, and in this case it doesn’t, since sleep is an intransitive verb. Embedded in that VP, as in all VPs, is an external argument, in this case the NP (Noun Phrase) “colorless green ideas”, and a V’ (read as “V bar”). The V’ itself contains the V “sleep” and the AP (Adjunct Phrase) “furiously”.

There’s more analysis to be done on this sentence (going into the NP and its adjuncts), but I’ll spare you. The point I’m trying to make is that rules govern the syntax of languages, but these rules are, under Chomsky’s original proposition, unrelated to semantics. He argued it is entirely possible for a sentence to be syntactically grammatical and semantically meaningless, which I think is well-evidenced by the fact that there are some meaningless sentences that seem like English and some that don’t.

Later linguists working with later models have challenged the strict hierarchy of this theory (called the Minimalist Program), and have also challenged its total separation of syntax and semantics.

The other point I should have made clearer in my first comment is that most people use “grammar rules” differently from how linguists use the term, including, I think, the person I was replying to. Linguists are scientists, and therefore take a descriptive view of language. We model what we observe. If our rules don’t conform to how people actually speak, it is we who are wrong, not the speakers, just like how a physicist’s model of particle behavior must be wrong if it doesn’t accurately product how a particle acts. This disqualifies almost all the grammar rules you learned in school. Things like “you can’t say ‘me and my dad went to the store’” or “you can’t end a sentence with a preposition” are obviously wrong, because people do it all the time. If those actually produced sentences universally judged by our mental grammar to be unacceptable, then people wouldn’t do them. The job of syntacticians is not to impose arbitrary rules like these, but instead to discover the actual, implicitly understood rules governing how all real human beings speak, not just those who have been taught to speak in a certain educated register.

3

spirosand t1_j6oov08 wrote

Miami and NYC are feeling the effects, king high tides are problematic. It's pretty much worldwide.

Sand beaches just move with the sea level, so there isn't much visible effect.

The ocean is seldom just calm, so it's hard to see actual photos of direct sea level rise. It's more that more and more places are flooding.

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