I am not sure whether there's a clinical term for it but if you can help me find the closest term for such behaviour I can do some research on it.
What do you call a person that disagrees with your statement but then is effectively saying the same thing?
NOTE: The person in question has been exposed to very simple questions that can't be classified as complex and yet failed to notice what he/she was doing there.
I will explain this in practical terms using one example (this example is not the same the person was exposed to)
I: The football match is on Wednesday (saying this Sunday) He/she: No it's not, it's in 3 days. (which effectively is Wednesday)
I know the example is a bit late but it's to give you the gist of the situation I'm trying to explain.