Can we all agree on the following definitions (summarized from well established dictionaries):
Lie - an intentional inaccurate statement meant to deceive or mislead.
*we have no concrete evidence that what he states is ever intended to deceive (although, I guess no one can be certain except for a few of the real justification behind the “420” tweet)
Untruthful - pattern of false statements, diverging from facts or reality.
*we have many documented instances of false statements in the form of wildly optimistic deadlines. Elon likes to shoot himself in the foot with these.
So, by definition, to extent of our observations, one can say Elon is untruthful, but he’s not a liar.
Case closed, hopefully.