On: Mathematicians Are Hoarding a Type of Japanese Cha...

[hobs]

It definitely works under the following conditions(I have done it dozens of times when a dangus has written on my whiteboard with the wrong marker):

1. You have just applied the permanent marker

2. You have a fairly wet dry-erase marker

3. You blot the perm with the dry-erase so as to flush the site with ink

4. Attempt to wipe/remove

5. Do this fast