Re: also vs either
Doctors aren't sure about this, nor do they know exactly what causes the problem.
Originally Posted by keannu
Doctors aren't sure about this. They also don't know exactly ...
Doctors aren't sure about this. They don't know exactly what causes the problem either.
As a side note, I had never heard of "zzz-mailing" before. Note that it really only works in AmE, where the letter "z" is pronounced "zee" so the phrase is pronounced "zee-mailing" which does indeed sound like "emailing". However, in BrE, "z" is pronounced "zed" so that phrase either says "zed-mailing" which makes no sense or simply uses the buzzing sound "zzz" (like a bee) followed by the word "mailing", which doesn't make sense either.
Remember - correct capitalisation, punctuation and spacing make posts much easier to read.