By Palegrass Hot! — Lisa -v3.1.3a-
Thanks to the "3A" patch, her most important lines are never her first lines. In v3.1.2, she would respond immediately. In v3.1.3A, she waits. This waiting period is where the magic happens. Users report that after a long pause, Lisa will suddenly interject with a line that perfectly encapsulates a conversation from ten minutes prior, as if she had been processing the entire time.
No developer has publicly explained why these three questions are hardcoded. Lisa -v3.1.3A- By PaleGrass