CAS command question

[Arno K]

First I did not want to bother about this topic anymore after my first comment (left is left...) was smashed back by Bernard in a quite rude way

Quote: This is not a bug and has nothing to do with left and right, it's because evaluation rewrites inequation with >= or >. If you enter x<2, it is evaled as 2>x.

, I read it like : this is not a bug and you are simply unable to understand it, something Dale may have thought reading parisse's answer somewhere else.
I will not say that I can write a program like this CAS, but I am earning my money in another way where I teach students and pupils maths and so using a tool like a calculator, too, I can convince them to buy a specific device of which here Parisse is one of the main actors, and thus he also depends on me.
But I have written programs of all kinds since 1982, most of the time the commands did what they should, so something called "left" delivered left.
Perhaps he should have written that the help-file only deals with equations and intervals and for other objects it will provide some kind of answer and then have explained the special behaviour in case of inequations. But still then I would think that this has to be explained in the help ( how I liked the advanced users guide of my 32S and 48).
This had to be said.
Now I read that at least three others members agree to this being a bug, at least some kind of wrong naming. Here are my 2 pence:
The commands left and right should provide an error when used with inequations and two new commands should be implemented which leave the expression as it is and provide the desired part of the entered expression (without any longer thought: exleft and exright). This then would meet the needs for any problem concerning parts of an expression.
Arno