Palindromic Expression for Phi

Some find that APL expressions can have a poetic beauty. Phil Last submitted the following variable-free recursive dfn to compute the limit of a converging function, equivalent to the derived monadic operator : John Scholes noted that it was close to being a palindrome, so he inlined it and he amended it with dummy code to make its invocation for finding the golden ratio even closer to palindromic: Scholes then published a minute-long video with musical accompaniment where he types the expression in a symmetric fashion, culminating with the execution.