Read the following premise and answer if the hypothesis is true.
The crystallographic restriction theorem in its basic form was based on the observation that the rotational symmetries of a crystal are usually limited to 2-fold, 3-fold, 4-fold, and 6-fold. However, quasicrystals can occur with other diffraction pattern symmetries, such as 5-fold; these were not discovered until 1982 by Dan Shechtman.
Hypothesis: these were not discovered until 1985 by Dan Shechtman. Is the answer "Yes", "No", or "It's impossible to say"? Respond with only the answer and no additional text.
No
No.