Inaccurate information can be worse than none

We live in an information-rich world. With the internet at our fingertips, we can access what we need in moments. And companies are getting better at providing us with useful information and facilities. I heave a sigh of relief when I go to a restaurant's website, for instance, and discover I can book online, rather than go through that exercise of ringing up where you either a) get no answer, b) get an answerphone that doesn't take a message, c) get an answerphone that does take a message, but then are never sure if they took your booking, or d) speak to someone who makes it clear that you have to be an idiot to be making a booking so close to the date, as they are always very busy.

This information bounty has even stretched to that bane of life, the home delivery. Time was when you sat in all day on the off chance the delivery driver deigned to call. As it happens, working from home, so I have it easy compared to many people. But even I have problems as most days I pop out a few times. Walk the dog, nip to the post office, hit the corner shop. And you can guarantee that the delivery driver, who has clearly been sitting at the end of the road watching my house, waiting for me to go out, will pick the middle of the five minutes I'm out to attempt a delivery.

One option is the ability to pick your package up somewhere convenient. That's great if you are a commuter, and can do a pick-up on your way home. But I'd still rather have something delivered, particularly if it weighs a ton. And to my rescue comes that shining example of information excellence, the delivery slot.

The first people I remember doing this was the food delivery companies, but now several of the better known courier services do it. How I laughed when I first got an email from DPD like the one above and discovered I was getting a delivery between 9:22 and 10:22. But aside from the comical time range, it's a brilliant collection of information. When it will be delivered, who the driver is (not sure why I should know, but nice touch) and easy access to reschedule or track. Admittedly I didn't initially trust the time range, but to date they have had clockwork precision.

So when I was expecting an urgent parcel yesterday, it was a relief to see this text:

Admittedly there was that suspicious 'is estimated', but their website was more cheerful, telling me it would be delivered in the time range. So at ten past two I merrily took the dog for a 10 minute quick walk - only to discover on my return this depressing piece of paper:

Call me old fashioned, but 14:20 is not between 15:32 and 16:32 on my clock. Not by a long margin.

So, I eventually get to my point. Information like this is great - it really helps you organise your life. As long as it's correct. But if it's not, it makes matters worse. If I had expected the driver might turn up during my walk I would have stuck a note on the door saying I'd be back in 5 mins and with my mobile number. In this case I didn't bother, as I knew he* wasn't due for over an hour. And so the bad information was worse than no information at all.

Conclusion? This kind of thing is great, and I accept it will go wrong occasionally (we'll see if it happens again when they try to redeliver today), but once you start giving out time slots you ought to do everything you can to stick to them - and if you miss your slot, the company ought to know this and offer instant grovelling apologies. As yet, that highly informative squiggle on the card above is the only response I've had to their cockup.

* To avoid accusations of lazy gender stereotyping (why should the van driver be male?), I actually saw him as he drove away just as I got back to the house.

Why I hate opera

If I'm honest, the title of this post is an exaggeration to make a point. I don't really hate opera. There are a couple of operas - notably Monteverdi's Incoranazione di Poppea and Purcell's Dido & Aeneas - that I quite like. But what I do find truly sickening is the reverence with which opera is treated, as if it were some particularly great art form. Nowhere was this more obvious than in ITV's recent gut-wrenchingly awful series Pop Star to Opera Star , where the likes of Alan Tichmarsh treated the real opera singers as if they were fragile pieces on Antiques Roadshow, and the music as if it were a gift of the gods. In my opinion - and I know not everyone agrees - opera is: Mediocre music Melodramatic plots Amateurishly hammy acting A forced and unpleasant singing style Ridiculously over-supported by public funds I won't even bother to go into any detail on the plots and the acting - this is just self-evident. But the other aspects need some ex

Is 5x3 the same as 3x5?

The Internet has gone mildly bonkers over a child in America who was marked down in a test because when asked to work out 5x3 by repeated addition he/she used 5+5+5 instead of 3+3+3+3+3. Those who support the teacher say that 5x3 means 'five lots of 3' where the complainants say that 'times' is commutative (reversible) so the distinction is meaningless as 5x3 and 3x5 are indistinguishable. It's certainly true that not all mathematical operations are commutative. I think we are all comfortable that 5-3 is not the same as 3-5. However. This not true of multiplication (of numbers). And so if there is to be any distinction, it has to be in the use of English to interpret the 'x' sign. Unfortunately, even here there is no logical way of coming up with a definitive answer. I suspect most primary school teachers would expands 'times' as 'lots of' as mentioned above. So we get 5 x 3 as '5 lots of 3'. Unfortunately that only wor

Which idiot came up with percentage-based gradient signs

Rant warning: the contents of this post could sound like something produced by UKIP. I wish to make it clear that I do not in any way support or endorse that political party. In fact it gives me the creeps. Once upon a time, the signs for a steep hill on British roads displayed the gradient in a simple, easy-to-understand form. If the hill went up, say, one yard for every three yards forward it said '1 in 3'. Then some bureaucrat came along and decided that it would be a good idea to state the slope as a percentage. So now the sign for (say) a 1 in 10 slope says 10% (I think). That 'I think' is because the percentage-based slope is so unnatural. There are two ways we conventionally measure slopes. Either on X/Y coordiates (as in 1 in 4) or using degrees - say at a 15° angle. We don't measure them in percentages. It's easy to visualize a 1 in 3 slope, or a 30 degree angle. Much less obvious what a 33.333 recurring percent slope is. And what's a 100% slope

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