The classic example given to decide what is Truth is the example of the butcher that was chasing the cow. A tapasvi sadhu witnessed the direction the cow was heading and when asked about it by the butcher he falls in Dharam Sankat, dilemma. The truth would be to tell the butcher the direction the cow headed, but the result of it would be all but Dharam. So, the truth in that circumstance is to save the cow by not revealing it's direction.
Vishnu/Krishna is known to have used Chhall on multiple occasions in multiple avatars to uphold Dharm.
We have to use vivek, dicerning intellect, to find the path of Dharm when stuck in a sankat, dilemma. Nothing in life is clear cut. Upholding Dharam in the broader sense should be the guiding path. Sometimes you need to curve the finger to take out the butter.
Sun Tzu's Art of War says warfare is based on deception. Study any war. Look at guerilla warfare. Kharku Singhs taking out targets.
Symptoms of Shani affliction include continuous financial problems, difficulty in getting married and if you are married relationship would be rocky especially if your spouse too is afflicted by Saturn, workplace problems, education focus will be bad, health issues, depression and other mental afflictions, keeps you far from your loved ones and society hence many jailbirds are afflicted by Saturn. Financial and relationship problems seems to be the top recurring symptom.