Coherence theory of truth is a philosophical idea that suggests a belief or proposition is true if it coheres, or is logically consistent, with a set of other beliefs or propositions. In real life, one example of the coherence theory in action can be seen in the scientific method. Scientists develop theories and hypotheses that must align with previously established knowledge. For example, if a new medical discovery contradicts well-established scientific principles (like the theory of evolution or laws of physics), it would be scrutinized and tested thoroughly to see if it fits with existing scientific facts. If it doesn't fit, the new discovery may be rejected or revised. In this way, the idea of truth is based on consistency and harmony within a broader framework of beliefs, facts, or theories.