Obviously I have to accept that what has already happened cannot be undone but that does not mean we have to today suffer similar fools to those who brought about those things in the past. ... Correct people when they make a mistake and keep saying it is a mistake. ... Don't give in and alter the dictionary.
Yes, I realise that you would like to prevent any further evolution of language, but I'm far from convinced that is a good idea and, of course, it's never going to happen, even if you would like it to.
However, I can't help repeatedly coming back to the question of what (arbitrary) point in time one chooses to regard as having established what is 'correct' (for evermore). Had you been born at the time of the birth of your parents or grandparents, or Shakespeare, Chaucer or Beowolf, or even 'cavemen', would you really have campaigned for language to never change from what was 'correct' at that point in time?
... but they once did so it was/is not a mistake.
I'm not so sure of that. Once upon a time the ('correct') meaning of "plumber" was (and was only) a person who worked with lead - so how can it be correct (in your eyes) to now use the word to refer to a person who doesn't work with lead?
Because they don't
Although the words are widely used 'colloquially' by the general public, very few of them will even know that they actually have (had?) a meaning in terms of the numerical value of IQ - and psychologists etc. (who originally defined the words) stopped using them decades ago because of the way they were being used by the general public. Similar with "cretin", which very few peopleknow has anything to do with thyroid function and which those few who
did know that stopped using the word decades ago for the same reason ans with the 'IQ words'.
It is presumably because hardly anyone realised that 'decim' meant a tenth and killing a tenth of the population was fairly devastating.
Dunno. As I said, it's rather odd - since people now seem to regard it as relating to something considerably worse than "killing a tenth"
Not sure what the opposite of a tenth is.
That's why I wrote "almost the opposite". As above, I suspect most people think of it relating to consdierably more than "one tenth" - maybe "
all but one tenth" (i.e. 90%)?
Will a spider ever be an insect just because idiots do not know they are not?
That's an example of what I wrote in my 'original' message - some people being "simply wrong" (in terms of current accepted meanings) if they describe a spider as an insect - just as they would be if they called a screwdriver a saw!
As for idiots (IQ <25) not knowing this, the same might well be true of imbeciles (IQ 25-50) or even morons (IQ = 51-70), not to mention a good few people with 'average' or above-'average' IQs !
Kind Regards, John