People often use heuristic for different purpose. Sam is using a heuristic to decide what cell phone to buy, which may help her save time picking out her next cell phone.
Heuristics is often described as the mental shortcuts that helps to make easy the cognitive work of taking a decision. Examples tare the use off trial and error, a rule of thumb etc.
It is often known as an approach to problem-solving that employs some practical steps or shortcuts in giving or providing solutions.
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