Method call from ternary

Week4Ex3.rb

@byes = 0

def prompt(*args)
  print(*args)
  gets.chomp
end

def random_year
  rand(21) + 1930
end

def introduce_grandma
  "Grandma is listening.\nGreet her, ask her a question.\nJust make sure you shout; she is hard of hearing."
end

def you_say_to_grandma
  prompt "     You say: "
end

def grandma_responds_to (something = you_say_to_grandma)
  unless something != "BYE" then
    @byes > 2 ? grandma_says_farewell : @byes += 1
  else
    something == something.upcase! ? "Grandma says: HUH? SPEAK UP, SONNY!" : "Grandma says: NO, NOT SINCE #{random_year}"
  end
end

def grandma_says_farewell
  print "SO LONG SONNY! NICE TALKING TO YOU!"
end

puts conversation = introduce_grandma

print "#{conversation}\n" while conversation = grandma_responds_to

Just loaded the whole thing in, minus the calls to the methods into irb and say @byes incrementing. Then I killed the process in irb and checked @byes and the ternary logic on line 22:

@byes
=> 3
@byes > 2 ? grandma_says_farewell : @byes += 1
SO LONG SONNY! NICE TALKING TO YOU!=> nil

There are a few ways to solve this. The biggest thing is that you don't reset the counter to 0 to enforce the consecutive BYE rule. You start at 0, and check first then increment and so you will exit when that count gets to 3 (larger than 2), which means 4 iterations of it. Not what you want. So, two points:
Reset a counter (You chose to use @bye) to 0 if granny doesn't hear BYE, and increment properly.

I placed the code in our Dropbox.