Other

example.rb

class Estimated < Other; end
class Forwarded < Other; end

case discussable
when Estimated then :queued  # discussable.estimate?
when Forwarded then :read    # discussable.forward?
else :unread
end

other.rb

# Create by passing the method you want to call
# ESTIMATED = Other.new(:estimate?)
# 
# Guesses by class name if no flag passed:
# class Estimated < Other; end
class Other < Struct.new(:flag)
  class << self
    def === other
      # try estimated? estimate? estimat?, forwarded? forwarde? forward?
      other.send (0..2).map { |o| name.demodulize.downcase[0..(-o)].questionable }
    end
  end
  
  def === other
    other.try flag
  end
end

string.rb

# String extensions
class String
  def questionable
    questionable? ? to_s : "#{to_s}?"
  end
  
  def questionable!
    replace questionable
  end
  
  def questionable?
    self[-1, 1] == '?'
  end
end