medium-elvis2.kt

fun main() {
    println(null != null ?: false)
    val first = null // we don't know the type of this guy
    val second = null ?: false // this guy is a boolean!
    println(first != second)
    var notNullableGuy = first != second // this guy is a non nullable boolean
    notNullableGuy = false // we can do this
    println(notNullableGuy)
}