In Spanish, when you want to encourage someone not don’t give up, you tell that person: “Lechuga” which is the short pronunciation of “never give up” in Spanish.
This is truly meaningful and gorgeous.
Could’ve sworn it meant lettuce.
My solution: I think that the image is possible. Foremost, by the details of the image, I assume that the card has two identical and symmetric sides. Then here is one way, that I think is used to make that pattern (the photo above). Also, thanks for your problem.
Hey there, spring-of-mathematics!
Nice to hear from you. Your analysis is completely right, well done! If you like to puzzle over another impossible object: after a little search I stumbled upon the top image. Again, no glue or other sneaky tricks have been used.
Good luck with this one!