As a service to my delightful and discerning readership (one of whom recently commented that he read one of my posts with all due contempt, which I have to say is precisely the correct amount of contempt with which to read my outpourings) I have decided to offer a short course in logic.
However, if your collar is feeling unexpectedly hot, you may want to consider if you have, in fact, committed any of these howlers. Even if you have, it would of course be a logical fallacy to conclude either that you are the only person reading this to have done so, or that this post is all about you.
Part of the problem is, of course, that Twitter limits one to 140 characters. But that is only part of the problem...
It has been kindly pointed out by my friend, the Part Time Pilgrim (@PartTimePilgrim), that where I wrote 'youth', I should have written 'infancy'. I apologise for the error and am happy to correct it.