15. It is, of course, argued by the learned ASC, Vigilance that the statutory presumption can still be raised even after the decoy turns hostile on the basis of circumstantial evidence, but here in this case, no cogent and firm circumstance has been brought in evidence to raise the presumption U/S. 20 of the Act against the appellant. The prosecution, however, wants to rely upon certain part of the evidence of decoy, but he being already found to be wholly unreliable, such part of his evidence cannot be taken into consideration in isolation with his entire evidence and the same has to be read with his entire evidence as a whole. Besides, the ASC intends to rely upon the testimony of overhearing witness PW2, but such evidence of PW2 not being able to disclose on material aspect of demand, the same cannot be considered to infer demand made by the appellant. In view of the discussions made hereinabove and taking into consideration the evidence on record, this Court finds the learned trial Court to have relied upon the evidence of wholly unreliable witness of the decoy as