Even that is a sufficient level of understanding to correctly determine that a motorcycle is not an airplane.
While we might not have a complete picture of what consciousness entails, we can at least list some necessary conditions for it to arise. Any system that lacks those conditions can at least be proven to not be conscious.
With LLMs specifically, I think there is a very strong argument that they are not and cannot be conscious at all, regardless of how big of a corpus you throw at it or how many parameters it has. Emily Bender explains it well here:
https://medium.com/@emilymenonbender/thought-experiment-in-t...