R' Chaim ben R' Avrohom Yosef Kreisworth ZY"A (2001) was one of the great Torah giants of recent times. 16 Teves is his yartzeit. Here is a small story to illustrate how our Torah Sages are so intamately familiar with the words of the Talmud.
Chacham Benzion Abba Shaul ZY"A and yblch't Chacham Ovadia Yosef Shlita once went to
Think about the amout of time spent learning, and with what passion it must have been. Our great Torah leaders literally have Shas, Poskim, etc. on their fingertips. They literally know it the way most people know the names of their family members. So, the next time some mechutzif with a website wants to show how bright he is by "proving" that Gadol Ploni is incorrect in a ruling, think twice. If I may use the analogy, not just anybody can step into the ring with a heavyweight champ. May we be worthy of having great Torah leaders to guide us.