There are four cards. Each has a number printed on one side and a letter on the other.

There is a rule - which may or may not be true - that every card printed with 'D' on one side must have '3' printed on the other side.

The cards are laid down. They show D, F, 3, 7.

Which card(s) do you have to turn over in order to verify whether or not the rule holds good?

The solution - and the reasoning behind it - is given at around the 3-minute point in the video linked to below.

Here's an idea I picked up from a friend of a friend on Facebook.

Write the happiest story you can, using only four words.

Awaiting your contributions with interest.

My new Facebook avatar

A couple of years before I joined this site I made my first - and so far my only - attempt at cross-dressing for a Halloween do. It was a wicked witch of the west thing, and it went down pretty well. The only problem I had was with the underwear, which wasn't my size and made me feel really uncomfortable.

To cut a long story short, my knickers kept falling down.

A month ago I had a rather significant birthday. Although I'm still the same age as Johnny Rotten and Kim Cattrall, when both digits click over you tend to muse upon your own mortality rather more than you do on other occasions. In my case I can only reflect that I've been incredibly lucky to have avoided any significant health issues, and that the law of averages alone will ensure that this won't last for ever.

Friday 3pm
10 miles north of Newcastle upon Tyne, England

The correct answer is YES.

On the face of it there doesn't seem to be enough information to solve this problem. After all, we don't know Anne's marital status.

What we do know is that she is either married or unmarried.

If Anne is married, and she is looking at George, who is unmarried, then the answer is yes.

If Anne is unmarried, and John, who is married, is looking at her, then the answer is also yes.

I noticed this on the Guardian website this morning:

http://www.theguardian.com/commentisfree/2016/mar/23/gender-...

I'm not sure what to think about this. If it's a step towards a time when people can wear whatever the hell they like and no one bats an eyelid then I'm all for it.

I bloody hate February.

With each day that passes the leafless trees, the bare fields, the unrelenting grey skies and the cold, dark nights imprint themselves more indelibly onto your consciousness, so that by this time of the month it's almost impossible to imagine the world being any other way. The memories of Christmas and New Year that got you through January have faded too much to be of any help, and spring is still too far in the future to be more than wishful thinking.

And this year it has an extra sodding day in it!

Anyone who's lost faith in Dr Who recently would do well to watch 'Hell Bent', the conclusion to the current series. They'll get it back, my God will they.

The Guardian has carried quite a few articles about transphobia lately. This, from Owen Jones, is one of the best.

http://www.theguardian.com/commentisfree/2015/oct/20/trans-t...

"I never had a son. I had a daughter who came out a bit wrong."

'Boy Meets Girl' is a new BBC sitcom set in Newcastle-upon-Tyne. It's the first transgender themed comedy to be made in the UK, and features trans actress Rebecca Root in one of the lead roles. As far as I know, it has no connection to the recent movie of the same name.

I have had a very nice birthday. I got some cake-flavoured M & Ms - the blue ones are the best - some Wonka Runts, some DVDs by Dr Michio Kaku that will help me travel to a parallel universe, travel through time and build a flying saucer, and a beautiful framed map of the River Wear as it was in 1898. I was also treated to several drinks at the Ashbrooke beer festival, which may explain why I am in such a mellow mood.

As far as headlong rushes towards the grave go, this isn't turning out to be an unpleasant one.

Predestination is an Australian movie released in 2014, starring Ethan Hawke and Sarah Snook. It's based on the Robert Heinlein short story 'All You Zombies'.

The film received critical acclaim for Snook's outstanding portrayal of a character who at first appears to be a woman transitioning to male, but her story is much, much stranger than that.

Although the version here isn't of the very highest quality, it's certainly watchable.

http://youtu.be/jEYVgqIlrJE

Black Friday.

Almost unheard of in the UK two years ago. Now it's everywhere you look.

The paperback had a really cool cover. 'Superbly crafted dark fantasy', it said. I was hooked.

If only I hadn't tried to read the damn thing...