Telling explicitly what one wants to do actually helps the compiler and it helps with the maintenance. The compiler then can help me to find calls which are jus

Telling explicitly what one wants to do actually helps the compiler and it helps with the maintenance. The compiler then can help me to find calls which are just accidents, name clashes, etc. In a Lisp-2 in the expression (sin 2) then SIN is always a function name. It can't be anything else. It's not possible to bind a name in the function namespace to a non-function (or macro). Using something like FUNCALL is a clear sign that a function value is being called. This makes the source code longer, but it helps me to understand the code even months/years later.