I just had the following schizoid exchange with a student through email.
“Professor Clarissa, is it OK if I send the midterm tomorrow in the morning?”
“Of course.”
“Of course it’s OK or of course it isn’t OK?”
“You have my permission to submit the midterm tomorrow.”
“Are you sure?”
Clarissa's Blog 
It sounds to me as though the student was expecting an argument and was a bit disorinted when none occurred.
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Maybe the student felt lonely and wanted to chat. 🙂
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