Since all functions in Cinciarellang are anonymous, and since they are also pure, you cannot reliably call their name from within their body.
This is because their name isn't defined in their inner scope, it's defined in the outer scope, which a pure function cannot read. And since "their name" may not even be unique (eg: multiple references to the same function), it can't be bound to their internal environment once and for all.
This is why the variable this was chosen to refer to a function from within itself:
fib = \n -> n <= 1 ? 1 : this(n-1) + this(n-2);
fib(10); //89
Though it may look weird or too wordy, this has the added benefit of making it very explicit when a function is recursive.