"Αυτός δεν είναι πεσιμιστής,είναι σκεπτικιστής."
Translation:He is not a pessimist, he is a skeptic.
I am finding it too difficult to use the τονοι with my keyboard. So far it has not been a problem - I get graded 'almost right' . This is the first time I have been marked incorrect despite all spelling correct.
Well, I understand it's something that greek learners have a hard time getting used to, but unfortunately, they are vital in written greek, and it's a good method for you to remember how words are pronounced in spoken greek as well. ^.^ (Not sure why you were marked incorrect though. )