This remark appears in the form of a question to reflect Pilate's belief that no one really knows what truth is. AT: "No one can know what is true!" (See: [[rc://en/ta/man/translate/figs-rquestion]])
This is an ellipsis. You can add the implied words. AT: "No! Do not release this man! Release Barabbas instead" (See: [[rc://en/ta/man/translate/figs-ellipsis]])