Well I don't understand the nitroglycerin reference and of course "computationally universal" doesn't mean "sentient" but the point is when you add the external memory they (Flan-U-PaLM 540B to be specific) have been demonstrated to be capable of simulating a specific, well defined Turing machine without special training. There are some other papers out there arguing this from a theoretical angle too, but this is the one whose title I quoted:

https://arxiv.org/abs/2301.04589