13.17 Chapter: The Use of Spies 13.17 < /br> Translation: Without subtle ingenuity of mind, one cannot make certain of the truth of their reports. < /br> CommentaryWhen spies make reports, they may not be accurate. They may have found weak information. They may have been discovered and fed false information. They may even have been turned to work against you. Seek to find ways of verifying what your spies whisper. Look for confirmation to other spies that the first spy does not know about.