/sci/ - Science & Math

>>10707087
hello anons... i need your help...
what are the most important research skills for theoretical physics? mathematical physics?

Truthful Tina and Lying Leah are identical twins whose parents have
separated; Tina lives with her mother and Leah lives with her father.
Susan, the school secretary, who is known to be particularly clever and a
master of logic, wishes to send letters to each of their parents. Although
she has two addresses in the school file she doesn’t know which address
belongs to which parent.
Susan finds one of the girls in the playground but has no idea if she is
talking to Tina or Leah. She shows the girl one of the addresses and asks
her a question. She thanks the girl and returns to the office being able to
correctly address both envelopes to the parents.
What question could Susan have asked?