Despite advancements in artificial intelligence, no machine has successfully passed the Turing test, which is considered a basic benchmark for determining a machine's ability to exhibit intelligent behavior indistinguishable from a human. This test, while straightforward, highlights the challenges AIs face in replicating human-like thinking.

Furthermore, machines have not crossed what is referred to as "Ada's bar," an even more demanding criterion that suggests a machine's ability to generate original thoughts or ideas independently. This notion emphasizes the gap that still exists between human cognition and current AI capabilities, as noted by Walter Isaacson in his book, "The Innovators."