Either you know it, or you don't know it.

Which is it to be ?" He stood with his head on one side and himself on one side, in a bullying, interrogative manner, and he threw his forefinger at Mr.
Wopsle,--as it were to mark him out--before biting it again.
"Now!" said he.

"Do you know it, or don't you know it ?" "Certainly I know it," replied Mr.Wopsle.
"Certainly you know it.

Then why didn't you say so at first?
Now, I'll ask you another question,"-- taking possession of Mr.Wopsle, as if he had a right to him,--"do you know that none of these witnesses have yet been cross-examined ?" Mr.Wopsle was beginning, "I can only say--" when the stranger stopped him.
"What?
You won't answer the question, yes or no?
Now, I'll try you again." Throwing his finger at him again.

"Attend to me.