>> Consider the not-training that a certain poster here has
>> received.  He can't even divide both sides of an equation
>> by 2 successfully.
>
> Yes, and the reasoning needed to see that "the solutions
> to x^2 = 2 are +-sqrt(2)" implies that sqrt(2) has a sign
> is also missing. He and his supporters literally are unable
> to see what we're talking about when we say that if
> -sqrt(2) is negative, the symbol sqrt(2) is positive.
>
> I don't know how to bridge that gap. I suspect a good
> algebra teacher could do it, with persistence.
>
>                 - Randy

Good teachers are not indoctrinators. Relativists are
indoctrinators.

You are literally unable to see what I'm talking about
when I say that if -x is negative, the symbol x is either
positive or negative.
x = 3-5.
-x = sqrt(2)
 
Those that can, do. Those that cannot, indoctrinate.
Androcles.