[Grammar] suffer

[Maybo]

Without sleep, memory and decision processing suffer.

Does it mean without sleep, memory and decision would suffer, or they have to deal with suffer?

 

[GoesStation]

The sentence means your memory and ability to make good decisions diminish if you haven't had enough sleep.

I don't understand "they have to deal with suffer".

 

[jutfrank]

Two things suffer:
1) memory
2) decision processing

 

[Rover_KE]

Source and author please, Maybo.