I know it makes articles sound more dramatic and controversial, but sometimes the answer is obvious:

"So, does DoCoMo need to invest more in its infrastructure, or is Android a data hog that needs reigning in?"

The answer is clearly "both". Apps and android should optimize their data usage, doing so increases battery life and gives a better user experience all around. If DoCoMo is identifying particularly troublesome apps, then that is helpful to decide where to start hacking. _Also_, DoCoMo should be upgrading its infrastructure. It is clear that data use will only rise, and they certainly would like to have more customers, apps reducing their usage is a good thing, and will create a better experience, but not a solution to the problem that people actually have uses for all that data, and said usage will grow.

However they can tell by the serial number whether that iPad is fresh from the factory or restocked after a return.

It would be odd if 10 iPads shipped in different shipments, some used and returned without the customer before claiming it was made of clay all happend to be returned for being made of clay at once.

The human brain is absurdly faster/more powerful than even the largest computers today. Admittedly, we are getting closer to the point where the two will meet, but it is still decades away by most estimates.

You can turn on/off whether you appear in searches in the privacy settings.

Any shareholders who have the same belief can just sell their shares to the same effect. No need for particular action. They will get a much better deal than they would in a liquidation too.

Determining whether two boolean circuits are equivalent is a famously difficult problem to solve. In fact, it can be reduced to SAT (http://en.wikipedia.org/wiki/Boolean_satisfiability_problem) which was the very first algorithm that was shown to be NP-complete, which in general means it is impractical to solve on real computers.

What does the atomic weight have to do with anything?

my gram of gold still weight much less than a pound of boron.

A cubic meter of oxygen weights a lot less than a cubic meter of lithium.

What matters is the energy density they can achieve, which has nothing to do with atomic weight.

Not really. Your lifting power can never be more than the weight of air it displaces and hydrogen is already a whole lot less dense than air. If you do the math a complete vacuum will only lift about 7% more than hydrogen. Even then I don't think there is any technology that will give us light containers that can withstand vacuum pressures of any usable size.

The power supply may be perfectly happy putting out 20A but the wires leading to the outlet will have a maximum amperage before the melt. You can't tell that from a voltage drop.

No, from the outside it will look like the cube just falls in, depending on the size of the black hole and the angle of approach, we may see it undergo spagettification first.

However, you can use a black hole for data retention as a delay line. There is a distance above the black hole that is called the "photon sphere" which is the point that the orbital speed exactly equals the speed of light, meaning that photons injected at the proper angle will actually be in orbit around the black hole.

So, you can use a laser beam to spit out your data on an almost but not quite orbital path, sending the data around and picking it up after it orbits, picking out what you want and re-transmitting everything else. The latency would be high, but the storage space would be incredible. Imagine you set the angle so the light orbits enough time to travel a light week before you capture it again, todays optical interconnects work at 100Gb/s, a week is roughly 600 megaseconds so you get 60 petabytes of storage more or less, per frequency you use, and not to mention you can send data in both directions, and have delay lines longer than a light week. You could have a whole storage hierarchy with delay lines of a few light seconds to centuries around the same black hole to balance latency/storage space.