Problem:

The parameter weekday is true if it is a weekday, and the parameter vacation is true if we are on vacation. We sleep in if it is not a weekday or we're on vacation. Return true if we sleep in.

Test cases:

sleepIn(false, false) → true
sleepIn(true, false) → false
sleepIn(false, true) → true

Solution:

public boolean sleepIn(boolean weekday, boolean vacation) {
  if (!weekday || vacation) {
    return true;
  }
  
  return false;
  
  we just put the return-false last, or could use an if/else.
}