What is the legal burden of the propounder of a will?

Although the propounder of the will has the legal burden with respect to due execution, knowledge and approval, and testamentary capacity, the propounder is aided by a rebuttable presumption. Upon proof that the will was duly executed with the requisite formalities, after having been read over to or by a testator who appeared to understand it, the court will generally presume that the testator knew and approved of the contents of the will and had the necessary testamentary capacity: see Vout v. Hay, supra, at para. 26.