RE: Questions About The List Argument of Properties Like "unionOf"

> Dan Connolly wrote:
> 
> If you tried to say (rest L2 L3) and (first L3 #Elefant)
> this would be an inconsistency: since rest is functional,
> L3 = nil, and nothing is the first of nil.
> 

I don't understand that.

Does it mean that you cannot change the value of a functional property?

Marcelo Tallis
Teknowledge Corp.