Is there any serious doubt truth doesn’t exist ?

My teacher (who is not a philosophy teacher ) said truth didn’t exist. However I know cogito ergo sum ( even if it’s all a simulation or sth , I know I’m what is called a human organism in the fabric of this world, real or fake ) , I also know the earth has to do 584 million miles relative to the sun to do a whole orbital rotation around it . So unless I’m missing something, what my teacher said isn’t correct . So truth exists. What is more likely is that we can’t appreciate reality entirely because our perception is tainted. In my philosophy class we always talked about everyone seeing the world with tainted glasses so it’s impossible to see reality. But that doesn’t imply reality doesn’t exist , we just don’t have the ability to reach it , and we may never will. But we can still reach to some truths . I know in 24 hours the earth would have moved 40k km and it will be night again .