Answer – SCRAMBLED EGGS. There are no instructions in the indication: The Solver must literally « say what he sees ». Compare rebus 3 (b) and 3 (c) in box 3 above. I still do not know for sure if there are up to 100 palindromic words in English. Everyone I know has tried to produce so many. Maybe there are over 100 at the Oxford English Dictionary (hereafter called OED), but I would be very surprised to discover that there is much more to it than that. The www.palindromelist.net/#words website, which claims to have « The Biggest List of Palindromes Online », gives only 40. It turns out that it is not easy to determine the number of palindromes of a word, not even by far. We will not go far from the task before we ask ourselves what to consider as a word. Each letter can serve as a word in context: « Beethoven`s Fifth Symphony is in C-minor; » « Z is the last letter of the English alphabet. » Should we consider each of them as a palindrome word? Should we count statistics that are an acronym for statistics, but have been considered a separate word because of their widespread use? Is the race car one or two words? What about tests or spacecaps? A critical error in this approach is that it overlooks the interactive nature of problem solving: the successful solution arises from the interaction between the problem and the person, each individual bringing a unique blend of knowledge, experience and cognitive approaches (Ash et al., 2009; Ohlsson, 2011).

It is therefore quite possible to solve an « insight puzzle » with controlled, intentional, systematic and evaluative means by some Solver – analytical thinking type 2 according to the theory of the alternating process (Evans and Stanovich, 2013; Sowden et al., 2015; Weisberg, 2015) – what is not considered a strong emotional reaction characteristics, apart from the satisfaction of the work done, Kounios and Beeman, 2014). It is perhaps likely for the reader that there are more than 50 words in five letters in the language that start with C and have the D as the third letter, and of course, this exercise, with the arbitrary allocation of percentages, provides a very meagre basis for expecting that there will be so few. After all, there are 17,576 ways to fill the gaps in C_D_. A moment of thought clearly shows that a small percentage of these possibilities make words; The realization that the second letter and at least one of the last two vowels must be vocal, reduces the number of possibilities to 936, but it is still a large number compared to 52. Indeed, a search of the OED revealed a list of 42 words in five letters with C and D in first and third letters, 16 of which are considered obsolete or archaic. (The list is available on request by email to the author.) My assumption is that the lists drawn up by the people who get such a task would show clusters in both phonetic and orthographic properties. I expect the GH to be silent or pronounced as /f/ to be a great, but not the only, determining of clustering. I expect to see COUGH and TOUGH in the same cluster, or BOUGH and DOUGH, more often than COUGH and BOUGH, or TOUGH and DOUGH. I don`t know how I would bet on which two of the next three will be most likely to happen together: THOUGH, ROUGH and WEIGH. THOUGH and WEIGH have common phonetic property of a silent GH, while THOUGH and ROUGH have much in common spells. Some indications are unclear that it is doubtful that they will lead a single person to their target words. Here are some examples of these tips that contain puns and other types of puns: cheese maker, minimal ends, gsge, long lunch, V, Y, butter, running in the heat, bed linen down, a cotillion in a pastry, A little low, Little colonizer in torment, Moving image.