Over the last 3 hours, lyndon lost $2,500 playing blackjack in monaco. as he walks out of the casino, he thinks about the hands that lost him the most money and wonders what would have happened if he had only played those hands differently. this "what if" kind of speculation is called thinking.

counterfactual                          

Explanation:

Counterfactual thinking: In psychology, the term "counterfactual thinking" refers to the concept that involves an individual's propensity to create or think of possible alternatives towards different life events that have occurred already in his or her life and is contrary to what had happened in the past. The thinking of an individual to find alternatives may include alternatives related to the future as well as past events.

Counterfactual thinking can be represented as 'counter to the facts'.

In the question above, the given statement signifies the "counterfactual thinking".