You see a player round a corner and know that they are likely to end up at point A, B, or C within times X, Y, or Z.
You hear a specific gun being used to your left, it is likely being fired from areas D, E, or F because those have good sightlines to where you are.
For both circumstances you know that of the Q number of weapons you have R will be the best option for the range that you will likely encounter the enemy at and grenade S will also help. Weapons T and U will leave you undermatched. You switch to Q, reload it in an area that you know is relatively safe. As your approach the target you know that enabling powerup V will help you get the upper hand.