After months of speculation by fans, the rumours that Yoda would return in The Last Jedi were true. The green alien, who died in Return of the Jedi and became a Force ghost could be heard in The Force Awakens, but in its follow-up he turned up in his very own ghostly flesh. Confirming he was a puppet in the style of the original trilogy, Johnson has explained why the 900-year-old Jedi came back. Speaking to Variety, he said: "It really was [a puppet]. I realised Yoda would have a natural place in this."
Can we infer the following?
Yoda is not centuries old.

- Yes.
- It's impossible to say.
- No.
The answer is:
No