Even though I previously stated that we will only “know” for 100% certainty, at the time of our death, the posting on apostolic succession shows again the misconception of our non catholic community…sometimes.
Apostolic succession is not based on the Pope, exactly. It is based upon the Apostles who set up , mostly through Paul administratively, a a group of church leaders. These leaders, when finally a title was considered appropriate, were called Bishops. At the same time Deacons were assigned to help with the workload.
Paul and others in the bible indicate that the Bishops were indoctrinated into the local community by the “laying on of hands” by one of the apostles or Paul, who remember is a de factor apostle for purposes of this topic. (God really laid his hands on Paul when he fell of the horse

) Once a Bishop was “consecrated” in this manner, he then could consecrate additional Bishops. BTW, Priests only came later as the workload grew.
OK, so the Bishops “ran” the local churches. Each new Bishop then was indoctrinated into the church by the laying on the hands of other Bishops. (Watch out non-catholics, this is where the church’s tradition merges with biblical reference, and verbal tradition in all cultures is tremendous strong in defining the daily actions and rules of the organization…any organization)
Thus, our tradition calls for the laying on of hands from one Bishop to the next. The reformation broke that tradition. So…for the reformation to be “valid” the importance of laying on of hands HAD TO BE MINIMIZED. Otherwise, the reformers could not complain autonomy. (Kind of like one cannot become a full LEGAL US Citizen without going through the ritual of commitment to USA and receipt of the legal documentation)
Peter, was of course, the Bishop of Rome, and originally shunned the idea of being the de facto “Pope”. He really considered himself something like an elder statesman, of a leader of equals. The larger authority of the Pope was established later, when future Bishops councils pondered the words of Jesus more deeply and concluded that this was Jesus’s intent by stating “you are Peter and upon this Rock I will build my Church”
The verification of Bishops and the Pope is a mixture of Biblical Scripture, and Church Tradition. Once again, if one negates any veracity in Church Tradition teachings, then of course a common ground is difficult to find in a reasonable discussion
Peace to all