How to dispute a debit charge<br>Identify the charge. Look at your atm statement or debit card receipts. See if you can identify each withdrawal or purchase billed to your debit card.
It is not impossible to dispute a debit charge. 
The point of the whole passage is how to dispute a debit charge. Therefore my statement saying it is NOT IMPOSSIBLE (double negative) to dispute it has to be correct. 
( z1 possible :polarity - :ARG1 ( z2 dispute :ARG1 ( z3 charge :ARG3 ( z4 debit ) ) ) )