How to detect underbluffing
Under-bluffing occurs when a betting or raising range of a player has less bluffs and more value-bets than a balanced strategy. At micro-stakes and low stakes, under-bluffing is very common. If you run into an under-bluffing opponent, making some tight folds is a great way to boost your winnings.
Here are some examples of situations where your opponent will not be able to bluff often enough to induce you to call with a marginal hand.