Raghavamma & Anr. v. Chenchamma & Anr., AIR 1964 SC 136, there is an essential distinction between burden of proof and onus of proof : burden of proof lies upon a person who has to prove the fact and which never shifts. Onus of proof shifts. Such a shifting of onus is a continuous process in the evaluation of evidence. In our opinion, in a suit for possession based on title once the plaintiff has been able to create a high degree of probability so as to shift the onus on the defendant it is for the defendant to discharge his onus and in the absence thereof the burden of proof lying on the plaintiff shall be held to have been discharged so as to amount to proof of the plaintiff's title.