"What's it mean, that every other line is written backwards?"

They may write backwards, reverse words when reading or be unable to tell time.

Although ten, he cannot draw and writes certain letters backwards.

After being injured in an automobile accident, had trouble writing, as she was only able to write backwards.

A simple (and once again easy to crack) encryption would be to write every word backwards.

He is known for his ability to write backwards on Plexiglas weather presentations.

Above the Persian is his own name written backwards in Latin.

Leonardo's notebooks are hard to read because he wrote backwards in "mirror writing".

The messenger was clearly having to write backwards and perhaps, Dervia thought, at arm's length.

Others are written backwards or worked in with graphics (as in the blue poster).