I can't fully understand the following dialogue. Any suggestions? A: Look! We're halfway down already! B: We're not even halfway yet? -------- From the person A's statement, I assume they have passed the halfway point. But the person B replies as if they haven't passed the halfway point yet. I'd like to know if the above dialogue is logical or not, though the dialogue was pick up from my English text book published in my country. :-)And, is there any possibility that the person B might assume they have passed the halfway point by the person A's statement.