[ianbooker]

For the sake of a mind game assume that assignments and solutions can be copyrighted.

The mind game is: The assignment is most likely produced with a solution, but published without (lets say else it would not be 'assignable'). For deterministic solutions, could you copyright it without publication?

[sodality2]

In other words, can a connect the dots or color by number drawing book claim copyright on the solved version?