Dude, that's already happened. Look at life expectancy increases in the West over the past 100 years. In the UK NHS, it's referred to as the 'population time bomb' as people think that we'll be unable to afford universal healthcare in 20 years' time. It hasn't stopped all of these life-prolonging treatments to become mainstream, and the UK government still spends millions every year educating people in health improvement that actually extends life and ultimately costs more (stop smoking, reduce saturated fat intake).

I don't think it's a useless file system. When I'm taking media to a conference, I have a small external hard drive with a small partition with exFAT drivers on, and a larger exFAT partition with all the media on it. That way, if there's an XP box being used for projection, I can move long video files around without the insanity of trying to use NTFS on removable media.

Ah, OK. I'm not sure why anyone would want to do that anyway, but fair enough. I want to have all of our music on all of our computers (synced via Home Sharing over WiFi) and then sync my mobile device to my laptop and my wife's to hers. That's what we did until Apple brought out iTunes Match, now we use that service as it's cheap and convenient.

"I can't believe that in 2013 she can only use an iPad properly with one computer" - what do you mean by that statement?

Yes, I suppose if you're organising your music on a 386SX25 with 10Mb RAM, the 'tons of hard drive space' used by a flat database would be a major concern.

Sound like you've never worked in paediatrics. Palpation is almost useless for children under 8, just go for what you can see, transilluminate or in this case pick up with infra-red.

I disagree. Certainly in paediatrics transilluminators work on all skin colours. To my knowledge, they don't use 'near-infrared' but use visible light, usually from red LEDs. This technology does use infra-red, and again skin pigmentation shouldn't matter. The projection-based devices I've used (e.g. Vein Viewer) worked fine on black african and asian skin pigments.

They did, just not head-mounted: http://www.christiedigital.com/en-us/projection-solutions/medical-innovations/pages/default.aspx

You don't know what you're talking about.

Yep, and this will help with those patients in no way at all. In fact, it's likely to make you try for a tiny mobile vein that looks good through the glasses but isn't any good in practice. This would certainly be a helpful tool in the toolkit, but in now way a complete answer.

Actually this sort of tech is available now, it uses a compact video projector rather than glasses. It works well, although it does have a tendency to make even tiny veins appear viable for cannulation. http://www.christiedigital.com/en-us/projection-solutions/medical-innovations/pages/default.aspx I can see the potential of using glasses, the good thing about the projection version is that other people can also see what you're doing, which is helpful for a difficult procedure (e.g. PICC lines) where a couple of people might be involved. I could also imagine it reducing litigation potential compared to a single person looking through glasses.

No, it's not. You inject in a site where you're unlikely to hit a vein, and before pushing the plunger you withdraw a little to ensure there's no flashback (of blood) which would indicate you're in a vein. Not difficult.

That's because of the inexperience/inability of the person doing the marking. When I did maths coursework assignments at school, they gave my work to the only Cambridge graduate maths teacher who had a proper maths degree. At the time, I didn't realise the significance, but in retrospect I'm grateful as he could give me marks for using a legitimate method, whereas the other teachers would call it the "wrong" method. Really, all exams should cater for people to use any legitimate method and markers should have the experience to recognise that they need to pass the paper on to someone who understands it properly.

I took maths exams before equation solving calculators were commonplace. I had the quadratic equation formula programmed into my graphing calculator permanently taking up one of its 10 memories. And, yes, I can still regurgitate the equation at will 20 years later.

I'm not sure why they say these things are hard to understand as it seems like even an idiot could.

They're hard to understand because there isn't a direct one-one relationship between intake and serum levels, and different substances have complex interactions that can take years of experience to properly understand. As a simple example, if you're low on sodium - take salt, right? Well if you eat table salt or inject sodium chloride your sodium will go up, but so will your chloride, which causes acidosis if it gets too high. The purest form of dietary management is parenteral (intravenous) nutrition, which is what people get in ICU/ITU when they can't eat or take gastric feeds. It's incredibly complex and very easy to get wrong.