Goal and options: cardboard

OPTIONS:
- makes a sign when wet
- makes a funny smell when wet
output answer: makes a funny smell when wet

Goal and options: PDF files

OPTIONS:
- can tie together old physical manuscripts into one document
- can tie together several old books into one document
output answer: can tie together several old books into one document

Goal and options: To use a metal material for bike tire grips that doesn't require a layer to protect the inner tube from puncturing.

OPTIONS:
- Use flat back rivets as grips.
- Use standard screws as grips.
output answer:
Use flat back rivets as grips.