dissenting:
I disagree with the result reached by Judge Johnson. I believe that just as a defendant must prove that the validity of a guilty plea is tainted and primarily motivated by an illegally obtained confession in order to warrant its withdrawal, see Commonwealth v. McCloud, 312 Pa.Super. 29, 458 A.2d 219 (1983) (POPOVICH, J.), petition for allocatur denied August 1, 1983, so to the appellant herein must show how an incorrectly worded advisement/stipulation concerning the admissibility of the results of a polygraph test affected his inculpatory statements given following the rendition of Miranda warnings and in the presence of counsel.