Ok so explain it to me 
So the tech tree is getting cut in half so presumably in a standard game it will be normal to have 15-20 turn times to research a technology.
But many of the culture themed 'technologies' from civ 4/5 are going into a new culture tree. Presumably things like pottery, literacy/drama & poetry, philosophy, mysticism, theology, guilds, civil service, education, chivalry/warrior tradition, architecture etc....
So are these cultural discoveries going to be unlocked in a linear culture tree or are there are going to be choices - i.e. you have to sacrifice some cultural discoveries to get others?
Also how do we unlock these cultural discoveries? is it through culture per turn? Culture is basically the other side to science?
And what about civics or social policies - is that going to be dependent on culture generation too or is there going to be a more complex system?

So the tech tree is getting cut in half so presumably in a standard game it will be normal to have 15-20 turn times to research a technology.
But many of the culture themed 'technologies' from civ 4/5 are going into a new culture tree. Presumably things like pottery, literacy/drama & poetry, philosophy, mysticism, theology, guilds, civil service, education, chivalry/warrior tradition, architecture etc....
So are these cultural discoveries going to be unlocked in a linear culture tree or are there are going to be choices - i.e. you have to sacrifice some cultural discoveries to get others?
Also how do we unlock these cultural discoveries? is it through culture per turn? Culture is basically the other side to science?
And what about civics or social policies - is that going to be dependent on culture generation too or is there going to be a more complex system?