1 point
spoiler
It’s not that it was reject as a type of cake per se, but that you need to fit 4 groups of 4, and there’s only one way to do that. It’s pretty common that there will be 5 or even 6 words that could fit in a single category. But there will only be one way to complete the whole board.
Which is why a tool like Connections Copilot are useful, to test out the whole board before committing. Or to at least only lock in an answer if you’re confident you’ve found the only four words that fit in that category.