In this puzzle, solvers often get stuck when trying to differentiate between the words that seem to fit into more than one category. For example, the word 'HOUSE' can be associated with both the 'COMPANY' category as a type of business entity and the idea of a physical structure, which can confuse players. Similarly, 'STOUT' might lead to ambiguity as it can describe both a type of beer and a physical characteristic of being solid or thick, making it harder for solvers to pin down its correct grouping. This kind of overlap can lead to misclassification and frustration when trying to finalize groups.

To effectively distinguish the real groups from plausible decoys, solvers should focus on the defining characteristics of the words in each category. For the 'YELLOW' group, words like 'SOLID,' 'SQUAT,' 'STOUT,' and 'THICK' all convey a sense of physical density or stoutness. In contrast, the 'GREEN' group consists of terms like 'CONCERN,' 'FIRM,' 'HOUSE,' and 'OUTFIT,' which all relate to business entities or organizations. By examining the core meanings and contexts of the words, players can more easily discern which group a word truly belongs to and avoid getting misled by surface similarities.

One useful heuristic for future puzzles is to look for thematic consistency within each group. For instance, if most words in a category relate to a specific concept, such as physical properties in the 'YELLOW' group, that can help confirm the groupings. Another strategy is to consider the frequency of specific meanings; if a word is commonly associated with a particular theme (like 'FIRM' with business), it is likely to belong to that category. Applying these strategies can help solvers make more confident decisions and improve their overall success in categorizing words.