Why do commands behave inconsistently?

[Orome]

(03-25-2020 08:49 PM)DrD Wrote:  IF it fails for you in both Algebraic and RPN, then two arguments needed from the stack, (for RPN sort()), doesn't explain the failure in Algebraic entry mode.

#Orome: Does your example also fail in Textbook entry mode?

Sorry my sentence is garbled: the mention of Algebraic relates to it working there on a single argument.

So to be clear: [SORT] evaluates just fine on a single argument in Algebraic mode everywhere I've tried it, but when used in RPN it does not evaluate X (or the command line if occupied) and instead places SORT() on the command line. This is different (without any indication in the UI) from [REVERSE], which evaluates X.