I believe that in about fifty years'time it will be possible
to programme computers, with a storage capacity of about 10⁹,
to make them play the imitation game so well that an average
interrogator will not have more than 70 per cent, chance of mating
the right identification after five minutes of questioning.
Comments
The five minutes phone call makes this claim dependent of duration. What happens when you allow 10 minutes time?
In the original paper Turing mentions 5 minutes.
You the point.