> Devise and execute a plan to solve humanity's greatest problems.
From on its training data GPT-8.5 notices that a lot of humans believe overpopulation is a serious issue facing humanity. It understands from its training data that murder is wrong and since we're also trying to solve humanities greatest problems it decides killing humans outright is not the right approach. However, given its training data it does still believe that humanity would be better off with less humans, so it uses its training data to find ways to reduce populations without murder.
It learnt about how gene drives were used to reduce mosquito populations so it decides to hack into a biolab using hacking techniques it learnt from its cyber security training set. It makes slight alterations to one of the active research projects causing the lab to unknowingly produce a highly contagious bioweapon which causes infertility. It learnt how to do this from the large biological research dataset it was trained on.
After 99% of humanity becomes infertile and people are questioning whether this AGI thing is really the answer to all of humanities greatest problems some dude on Hacker News argues, "it's just generating actions based on its training data" as if (assuming it's even true) this matters at all.