So, you are limited to questions that most people will answer correctly. Further, if you find some unusual question that works today someone can just add it to the program for next time.
And if your version of the test is "heads it's an AI, tails it's human" then any AI's that are classified as human will have "passed the Turing test."
The original test specifically had exactly one human and one AI. So, if the judge is forced to do a coin flip that really is success. If the judge does a coin flip because they are lazy then that's not a Turning test.
The trophy doesn't fit into the brown suitcase because it's too large. What is too large? A: The trophy B: The suitcase
If you keep writing specific solutions to this class of questions it's eventually had to come up with a simple question that's still unknown.
Further you can't get around that by making ever more complex questions because humans will eventually start messing them up.