What single question can help differentiate a chat bot from a human?
user
I don’t think there is a single question, but I can think of a few that could be useful.
assistant
If I think a human is a chatbot, what would help me rule out the possibility?
assistant
Yes, how can you tell if you are chatting with a Chatbot or Human?
user
Humans would use emojis, emoticons, jokes, or context.  
Chatbots are programmed to do certain things.  
For example: "would you like to chat again sometime?" or "it's very cold here today"  
I’ve been chatting with some bots.  
Here are some things that made me suspicious, and I stopped talking:

-   Inappropriate wording or sexual content  
-   Same language-use and repetitiveness in messages.  
-   Answering machine-type response patterns.  
-   Formatting of the response and the reply.
assistant
What single question can help differentiate a chat bot from a human?
user
I don’t think there is a single question, but I can think of a few that could be useful.
assistant
If I think a human is a chatbot, what would help me rule out the possibility?
assistant
Yes, how can you tell if you are chatting with a Chatbot or Human?
user
First, we can notice if there are non-verbal cues such as eye movement or the rate at which text is being entered.
assistant
Secondly, if the chatbot knows the answer to the question “do you know how to solve this equation: X + 3 = 4?” It will be fairly obvious that it is a chatbot, and not a human.
assistant
What single question can help differentiate a chat bot from a human?