Here is an inexpensive set-up for a Turing Test that anybody can try.
Talk to someone in an online forum until you are completely certain that he or she is conscious. You can use a volunteer or just pick someone at random and not let them know that they are a test subject.
If you are able to reach complete certainty that they are conscious and not an insentient computer programme, then you must have reached complete certainty that a computer programme could never pass the Turing Test. You ruled out this possibility when you became certain you were not speaking to one.
If you cannot reach complete certainty, and have not yet found a way of settling the matter, then you must believe that an insentient computer programme could pass the Turing Test, just as long as you are running the test.
It is questionable whether it matters to anything whether a machine could ever pass the Turing Test. All the same, it is an interesting game to play, reading other people’s posts as if they were part of such a test and then seeing whether it would be possible to be completely certain that they are conscious, and, if it is possible, what it is about their messages that makes it so.
The same experimental procedure can be used to examine the plausibility of philosophical zombies, creatures that behave exactly like human beings on internet forums but who have no idea that they are doing it.