This is a cellular automata rule (input Boolean == Left, Center, Right Cell) and output Boolean .

What is a better way to represent this in Scala.

trait Rule {
        def ruleId() : Int
        def rule(inputState:(Boolean, Boolean, Boolean)) : Boolean
        override def toString : String = "Rule:" + ruleId 
 }

class Rule90 extends Rule {
        def ruleId() = 90
        def rule(inputState:(Boolean, Boolean, Boolean)) : Boolean = {
            // Verbose version, show all 8 states
            inputState match {
                case (true,  true,  true)   => false
                case (true,  false, true)   => false  
                case (false,  true, false)  => false
                case (false,  false, false) => false
                case _   => true
            }            
        }
    }