A classic exercise in creative thinking, with a solution that offers the essence of how to think about design. Your task: Without taking pen off paper, and using only four straight lines, connect the nine dots.

I’ll post the answer in a few days.

These are not interchangeable. The former is synonymous with “entirely”, while the latter means “all in one group”.

• He is altogether (entirely) too lazy to be a success.
• The papers are all together (all in a group) in the binder I sent you.