Obviously not everyone has the slightest clue about Philosophy of Science and the hierarchy in the scientific method... It's such a shame, we need to integrate that into each and every nation's highschool curriculums. It's a problem that's doing more harm than benefits, we basically are empowering and encouraging dogmatic thinking. A lot of academics are complaining of younglings defending ideas they don't even have the slightest ideas about and denouncing anyone who disagrees a specific "Paradigm" whatever it was.
There are a lot of adjectival suffixes. Somewhere in duolingo forums someone posted a mnemonic sentence formed with all of these suffixes, 'my mother turns graves' or something like that. When I come across it I will try to remember and post it here.
For a list of the suffixes see https://www.turkishexplained.com/wordbanana.htm
@Hapzelschnapper I can't reply your comment due to technical restrictions. (I guess we have reached the limit.)
I really appreciate your work in there. That's a beautiful sum up for this topic. And I also liked hiperintens's comment below your comment.
As it is mentioned in the above comment. We call this topic as sıfat-fiil. (suffixes that are used to produce new adjectives out of verbs.)
There are also isim-fiil (suffixes that are used to produce new nouns out of verbs) and zarf-fiil (suffixes that are used to produce new adverbs out of verbs.)
I have found an image which shows these suffixes.
It's a coherent theory with evidence though. Gravity is just a theory too. Before scientists discovered theories of gravity, gravity already existed. But you can have different theories of gravity, Einstein or Newton. You can have different theories about evolution too, but scientific theories are not just blind speculation. The word theory doesn't mean it's unproven. Some theories can be proven, like Einstein's theory of relativity is proven to be correct.
You gotta read more about physics sir, before making assertions. Einstein's theory of General relativity can't be true... It's the best explanation we have yet, that's why scientists are working on Quantum Gravity... That's what all the people here are trying to say, science will always change, there's a term coined by famous science historian (Thomas Kuhn) known as " Paradigm shifts". There's always a paradigm shift, and no matter how sure we are, we shall never be dogmatic and narrow minded and more importantly illogical and arbitrary... because that's exactly how science was always halted!
Yeah, also to make you learn about subjects and sentences that are useful in everyday dialogues and situations... I'm sorry to burst a bubble, but Turkey is not renowned for its tolerance toward scientific topics, especially controversial ones... This is not me talking by the way, read Jerry A Coyne's introduction in his book "Why Evolution is True" and what he has to say about Turkey in that regards... So why would Duo teach people about a topic that will surely without any doubt get them into trouble?! It's supposed to teach them what is essentially beneficial to bridge the gaps between them and the locals? Not the opposite.
Edit: By the way, this is not in anyway meant to slander or vilify Turkey, it's just to put things in perspective..