Many ideas grow better when transplanted into another mind than in the one where they sprung up.
- Oliver Wendell Holmes on Synergy
How many times have you heard someone claim an idea as their own when the seed of that idea actually came from you, or someone else? You may have done that very thing yourself. Synergy is something that should be encouraged and in Design Thinking it's the fuel that allows the process to flow. Where synergy breaks down is when our human emotions kick in and we try to claim the result of the synergy as the product of our own isolated thinking.
As an agile coach I don't particularly care where the ideas come from or who was responsible for the idea as long as the result is a benefit for the team and the organisation. Of course it is a good idea to congratulate the team for their synergistic approach and the result, you may even call out an individual as a strong driver of the synergy but it's the result that really matters and that's a group effort.