Here I implement 'and' & 'or' functions using standard if-else expressions.

logic.scala

  // If the second parameter isn't set to eval as CBN
  // then infinite loops will hang before the method even begins
  def and(x: Boolean, y: => Boolean) =
    if (x) y else false                           
    
  and(true, false)                                
  and(false, true)                                
  and(false, false)                               
  and(true, true)                                 

  def or(x: Boolean, y: => Boolean) =
    if (x) true else if (y) true else false       

  or(true, true)                                  
  or(true, false)                                 
  or(false, true)                                 
  or(false, false)