When you uncover dinosaur bones it feels like going backwards.

As a reminder, dinosaur bones are real constraints that were previously hidden.

When you discover a dinosaur bone and dig it up, it feels like going backwards.

Previously there was no constraint, and now there is.

There's a new thing to disagree about!

But that dinosaur bone was there all along.

When it was hidden it was more dangerous, because you couldn't reason about it and pick solutions that fit within it, it was just lurking dangerously in the background.