Filing a written statement is not only way to defend a suit, but a defendant may successfully defend a suit by cross-examination and arguments.

SUPREME COURT OF INDIA JUDGMENTS

MODULA INDIA Vs. KAMAKSHYA SINGH DEO –  In case of failure of filing written statement, the defendant would not be entitled to lead any evidence of his own nor can his cross-examination be permitted to travel beyond the very limited objective of pointing out the falsity or weaknesses of the plaintiff’s case -SUPREME COURT OF INDIA [1988]