In Conservatorship of Hart (1991) 228 Cal. App. 3d 1244, the court discussed the trial court's discretion under the substituted judgment statutes: "The superior court's primary function under the substituted-judgment statute will be to make a decision (as the conservatee would if able) on the basis of information furnished to it. The information the superior court receives may or may not be consistent: If there are issues of fact the court of course must determine whether the issues are material to the decision to be made and then resolve any issues it deems material." ( Id. at p. 1254.) In its instructions on remand, the court said: "We should stress for purposes of remand, however, that adequate regard for the significance of substituted-judgment proceedings and for the rights of all parties including the conservatee requires that the superior court receive and consider relevant and otherwise admissible evidence." ( Id. at p. 1264.) With regard to the petition, the court said: "As a practical matter an uncontested petition will often be made the basis for a court's order not because it contains competent evidence but simply because it is uncontested; if the petition is contested the petitioner will normally be expected to proceed with evidence sufficient to sustain the applicable burden. In our view a superior court in substituted-judgment proceedings should be reluctant to grant this kind of petition by default. Better practice would be to require proof, by declaration or otherwise, of all relevant circumstances, even if the petition is unopposed." ( Id. at p. 1266.) As explained in Conservatorship of Hart (1991): "The doctrine underlying the substituted-judgment statute was first recognized in California in Estate of Christiansen (1967) 248 Cal. App. 2d 398 56 Cal. Rptr. 505 . . . . Christiansen declared 'that the courts of this state, in probate proceedings for the administration of the estates of insane or incompetent persons, have power and authority to determine whether to authorize transfers of the property of the incompetent for the purpose of avoiding unnecessary estate or inheritance taxes or expenses of administration, and to authorize such action where it appears from all the circumstances that the ward, if sane, as a reasonably prudent man, would so plan his estate, there being no substantial evidence of a contrary intent.' (248 Cal. App. 2d at p. 424.) Significantly, Christiansen did not require that a court find the ward would have acted as proposed; instead it adopted an essentially objective prudent-person standard. Thus Christiansen contemplated substitution of the court's judgment for that of the incompetent person." ( Conservatorship of Hart, supra, 228 Cal. App. 3d 1244, 1251-1252.)