Which one is better, functional or logic programming?
The following paper illustrates that you don't always need to decide: Expressivity of Functional-logic Languages and their Implementation by Juan José Moreno Navarro, LSIIS - Facultad de Informática, Universsidad Politécnica de Madrid It first shows simple problems in which one or the other is superior. Then it goes on to plot a possible implementation of a hybrid language in detail.