* From what position did Villain go all in?
* How many BB did Villain go all in for?
* Was there any action ahead of Villain?
* How many players are left to act after you?
* What is your own stack size?
* What is the stack size(s) of everyone, who have not yet folded?
* What is your position in the tournament?
* Are there ultra short stacks, that are likely to bust in the next few
hands?
* What is the payout structure?
* Is a min-cash really important to you for personal reasons?
* Do you have any reads on Villain?
When you have answered all these questions, you can decide, what range you want to give action with. In general there are extremely few scenarios, where KK would not be part of that range. I hope, this help.