[coldtea]

>This usage fits definitions a, b, and c.

No, it doesn't.

Government: - "We will use data just for medical purposes"

Government (later): - "Guess what, we lied/we recant: we will use them for other state purposes too".

There's nothing fallacious in (a), (b) or (c) way about either statement or the whole situation.

[hungryforcodes]

It's a brilliant example of doublethink you did there.