Wait, I thought you couldn't know and"practically speaking" it didnt matter?
DEFINITION Practically Speaking: "What matters in actual, day to day life, rather than in theory."
In theory, yes, it matters who is or isn't the pope. But, it's not a layman's job to figure this out, so I don't/can't worry about. God or the Church will figure it out eventually. Therefore, apart from the theory, in reality/practical/day to day terms, who is or isn't the pope doesn't affect my daily catholic duties to God. The daily requirements of our religion exist independent from who sits in the chair of St Peter.
The matter of the Pope only affects me when he makes a solemn decree, or appoints a new bishop to my diocese, or issues an encylical which binds me to believe some article of faith, or he changes a liturgical law which I must follow. This is why, in the centuries prior to the 1930s (i.e. before TV and radio), catholics did not even have the ABILITY to see the pope, or hear him speak, or engage in any of the modern day "pope worship" that we now consider commonplace, but which is excessive and uncatholic.
And in the last 50 years, post V2, there has been NO command, order, or law passed which requires me to accept heresy or obligates me to sin, issued from the V2 popes. Until they do, I can ignore them, because they haven't told me otherwise. The V2 popes have watered down the catholic religion, but no one is required to follow them, legally. They can jump off the cliff, but I don't have to.