In fact you need minimal IQ. I know most people will find that an obvious statement, but I like the scientific method so prefer to be able to prove a statement based on observations rather than pureley on heresay.
And the proof? Well, due to ongoing hassles with my postie (the one that delivers the regular mail), we have had to install a new letter box. Being a metre off the footpath, the old one is a apparently a bit inaccessible for him on his bike - boo hoo I thought, but apparently it's either replace the existing one that's been there for 15 years with no issues or he will keep running over my petunias......
So I got a new box and glued it to the top of our retaining wall which is right alongside the footpath (Aside, is there nothing you can't do with liquid nails?). The old box is solid brick and I didn't have time today to demolish it. That will have to wait till next weekend.
But, in the time span between me gluing the new one down, and going out to get dinner (about 30 minutes) the junk mail deliverers had been round. And you guessed it, they put the same junk mail in BOTH letter boxes.
Now it's not like my house looks like a mansion that would have 2 families living in it, and both letter boxes have the number 10 on them so you can tell they're for the same place. And the person who delivers my junk mail has been doing it for at least 6 months so they know it's new box, not a duplicate because I've suddenly sub-divided my block over the weekend.
So how dumb do you have to be to put it in twice!!!!
So on my way back from the takeaway shop, I saw the junk mailer posting in other peoples boxes. So I fronted her and gave her back the junk mail and told her I only wanted one lot. I pointed out that I hadn't put in the second box just to get twice the junk mail. I was polite, honest :-). Later her and her husband came round and he said she got confused when she saw the second box. Duh.
Then he asked did I want the second lot of junk mail still. Even after I explained to them that the second box was the new one and that I'd be demolishing the old one. Let's hope they are not planning a family, a great reason why you should have to have a licence to breed!
So now I have gone out with the masking tape and wrapped it around the old box till I get a chance to demolish it next weekend. Bloody idiots!