The Dunning-Kruger effect is a cognitive bias where people with limited knowledge or competence in a domain overestimate their own ability. The less you know, the harder it is to recognize what you're missing. This creates a paradox: incompetence hides itself. As people gain expertise, they become more aware of the gaps in their knowledge.

Confirmation bias is the tendency to search for, interpret, and remember information that confirms pre-existing beliefs while ignoring contradictory evidence. It affects decision-making by creating blind spots you see what you expect to see rather than what's actually there. This bias is one of the most pervasive obstacles to clear thinking and rational judgment.

Feedback loops are mechanisms where outputs of a system circle back as inputs, creating self-reinforcing (positive feedback) or self-correcting (negative feedback) cycles. Positive loops amplify changes and drive exponential growth or collapse. Negative loops stabilize systems and maintain equilibrium. Understanding feedback loops is essential for systems thinking and recognizing patterns in complex environments.

Cognitive biases are systematic patterns of deviation from rationality in judgment and decision-making. They're mental shortcuts (heuristics) that help us process information quickly but can lead to errors. They matter because they're predictable, pervasive, and often invisible to the person experiencing them. Awareness of cognitive biases is the first step toward clearer thinking.

Availability bias (or availability heuristic) is the tendency to overestimate the likelihood of events that are easy to recall or imagine. If you can quickly think of examples, you assume they're common. This leads to distorted risk assessment plane crashes feel more likely than car accidents because they're more memorable and widely covered in media, even though statistically car accidents are far more frequent.

Anchoring bias occurs when people rely too heavily on the first piece of information they encounter (the 'anchor') when making decisions. Even irrelevant numbers can influence subsequent judgments. In negotiations, the first offer sets an anchor that affects all following counteroffers. Awareness of anchoring helps you recognize when initial information is disproportionately influencing your thinking.

The sunk cost fallacy is the tendency to continue investing in something because you've already invested time, money, or effort even when continuing no longer makes sense. Past costs are irrelevant to future decisions, but psychologically, we feel compelled to justify previous investments. Recognizing sunk costs helps you make decisions based on future value rather than past commitment.