Re-pitching Notthingham from cider to beer?

[Yenren]

I have 3 single gallons of cider at OG 1.065, 1 was pitched cold (drinken nd brewen  ) I also have 15L of Graf OG 1.60ish all fermented with Nottingham. I am wondering would it be ok to re-pitch the yeast to future beers. I also have an imperial stout in the 1.100 range is yeast comming from this gravity suitable for re-pitching to lower gravity beers?

[Leann ull]

Nope you can't

[Yenren]

Can you elaborate a bit please. or direct me to your source
thanks

[Leann ull]

I just know...

Do you not trust me 
https://www.wyeastlab.com/com-yeast-harvest.cfm

[Yenren]

Tiz nice to know why.
Thanks