When your hand is supported by a call or a raise you need to know to guess what they can possibly hold with them to call your hand.  If you have right reading abilities you can figure out if they have a winning hand.  If you have a truly hopeless hand, you can decide to fold or you can modify your strategy to somehow kick the player off the table to eventually stop his claim on the pot with folding.

Well reading abilities are not any kind of intuition or ESP, they are a pure form of mathematical estimates.  Math can be misleading if you are not sure of the nature of the player.  The percentage chances of when your opponent can call in a Texas hold em poker room is also based upon the kind of player they are.

A loose player may call most of the time with AA-22, but a tight player will not call most of the time with such a hand. If a tight player in a Texas hold em poker room will call with AA, KK, AK at least 2% of the time, a loose player can be expected to call the same hand 50% of the time.  Probabilities should be worked out in close association with the kind of player that is your opponent.

There are going to be some hands that will win against any kind of player and any number of raises.  In order to not fold the pot committed hands you need to know what are those winning kind of hands in a Texas hold m poker room but sometimes a winning hand can be paralleled with some other player that has an equally winning possibility.  He may travel with you until the river to see that lucky 8 to get him to win.  He might be in need of just one card to make that small difference to win you away, and the one card may have just a 5% probability of showing up, but if luck is there with him, the 5% probability may show up in his favor and you can land up in a bad beat.