[aaron695]

>but if google can instantly translate English to Swahili

This is the problem, they can't. They can do the 80% to make it understandable but the last 20% is always the hard bit.

It'll happen one day, but it might be up there with the singularity for when it's viable. Fully understanding a paper to grade might equal AI intelligence on par with humans.

Not to say perhaps a quick hack, like a 80% grader that the teachers quickly look over to check and correct might be a game changer.

[JamieLewis]

I pulled the example from the air to make a point, but you are correct, the last 20% is 80% of the work...

See the comment by aaron695 who made a very good point about feedback.

I wonder though if there is some easy fruit at the bottom of the tree i.e. elementary school - where I gather grading is probably a lower burden and easier to formalise - although I am probably again greatly understating the problem.