Remove double questions

Double questions can be removed from the list.
Choose [Remove double questions] from the pop-up menu of the final question list.

First redundant question/answer combinations are removed.

After doing that, Teach looks for questions that are redundant, but have different answers.
Example:
groot = big
vet = big

After this the combination will be made:
groot; vet = big.

Having done that, Teach will look for different answers with the same question:
groot = large
groot = big

After this the combination will be made:
groot = large; big