No. It isn't all three. Here is another way to think about it : punctuation and spelling work on the written word. Tone and pitch apply to the spoken word. Grammar applies to the speech as well as literature because it has deeper connection to language.

Here is another way to think about it: grammar is syntax .

Punctuation exists to make that syntax more readable. Spelling exists to make vocabulary standardized. They are embellishments (in a linguistic sense), and grammar is the essence. The use of the symbols of punctuation and spelling for example , is rather variable in a language family - the Indo-European for example. Grammar, however, is not as variable. The elements of Indo-European grammar are common as far back as Panini.

If the subtleties are still lost on you, it is beyond my capacity to explain. The Wikipedia article provides a bunch of references that may be useful if you are interested.

I'll focus on the part of the sentence that is obviously the play on words "knowing your shit, and knowing you're shit?"

The verb knowing , as applied to the noun 'shit' is linked in two different ways in the phrases "knowing your shit" and "knowing you're shit?".
In the first case, it is linked to the noun using a second person possessive pronoun "your". The meaning is therefore indicating who the particular noun under discussion , i.e.'shit', belongs to.
In the second case, it is linked to the noun using a second person nominative pronoun, with the auxillary verb 'are' (to be, present complete tense). The meaning is therefore a description of the condition of this person.

That is grammar.

In the first case, your is spelled as it usually is, while in the second case "you are" is abbreviated to a colloquial "you're". This abbreviation does not change meaning.

That is spelling.

A comma indicates the two phrases. It is superfluous as the conjunction 'and' already exists in the following phrase. A question mark indicates the interrogative form of the sentence. The apostrophe is a convention indicating that an abbreviation is made. Neither of these change the meaning of the specific phrases under discussion, and the comma and apostrophe could have easily been avoided while still retaining meaning.

That is punctuation.

The play on words is only because in a particular dialect of the English called American English, the "your' and "you're" sound almost similar, while "shit" has multiple connotations. Some may even consider it funny.

As I said, punctuation may convey meaning, but it is typically manifested as tonal or other onomatopoeic variations while speaking. Grammar is more tied to the structure of a language and meaning.

Ellipses are punctuation, which is important in prose. Grammar on the other hand is not a mere symbolic identifier. Grammar establishes the rules of the language from which meaning is derived.

Yes, punctuation may also convey meaning , but has a much shallower effect than grammar.

1. It's spelt 'Kenya'
2. You can't play the global market without paying attention to global standards of obviousness.

You argument about Europeans and Americans is baseless. It is clear to everyone that Apple is simply litigating to prevent competition.

Speaking of Kenya, don't be an ostrich.

Assuming they want to retain their customers, this should spark a competition between ISPs to demonstrate , ironically, their incompetence at implementing relevant monitoring processes.

The next time a lawyer asks them for a user's data transaction list, they should be saying "Oh sure, here is a list of PING request sent from this users connection since January...."

How do you know if the WSJ article isn't paywalled just for Mac users? Works ok for me.

It is not nVidia's job to do ANYTHING for X or Y operating system. If they make crappy drivers for a certain OS, they lose market on that OS. Maybe they don't care about that market.

And why shouldn't that exactly be an nVidia employee's priorities? You seem to suggest it's a negative point.

Meh. It's a paper that exploits the fact that current chemical modifications involve mass shifts in a certain range. They just determined the range by running a mass-spec on the hundred or so things out there (which is trivial considering mass-specs can be done on thousands of sampes in an automated facility).

This 'mass-shift' range can easily change and is not likely to be valid even within months of this paper being out.

About a few hundred reasons, the most important of which are
1. the much larger likelihood of an immune reaction to the collagen-elastin matrix. Human collagen =! Cattle collagen , mainly in terms of glycosylation etc.

2. Large blood vessels of the body have some degree of specialization, they aren't just pipes. Finding an anatomically compatible cattle vein can be a problem, what with cattle liver being a completely different shape and all that.

3. As a matter of principle, you really don't want to expose cattle pathogens deep into the human peritoneum, it only encourages them to jump species. and before you say Sterilization, remember that is only a probabilistic process which you can't do too much of non-destructively.

If you can't beat 'em, find a way to make money while you join 'em.

Well played, Microsoft, well played.

All in all, that is really peanuts in terms of electicity bills. If you are spending roughly 2 hours a day gaming, a normal person with a full-time job and a family would have very little time to do much else that can sink money.

Considering that yearly electricty bills routinely reach about a $1000+ for a standard household, this added 10% due to gaming is pretty insignificant when compared to other hobbies...like racing cars for example.

Sure, there may be cheaper hobbies, but I honestly don't think anyone well-settled enough to be practising a daily hobby and deriving enjoyment from it finds it a problem to spend 8 bucks 50 cents a month for their recreation.

Try explaining to your boss or spouse, that the time spent playing a mindless game on the computer is actually an intense mind-wandering session that is going to boost your productivity. Or that you need this time to be your creative best.

In my experience, few people 'get it'.

Except, new designs of cars have a bunch of things that do make a difference- like aerodynamics and crumple zones. It's not _all_ about fashion. Much harder to say that about computer interface 'design'.