Very much not correct. The Plank time is a rough scale at which we know that our theories do not work. That might mean that a new discrete theory appears there (which is frankly quite probable), but we most certainly do not know whether that is the case and it is just as possible that the underlying theory is continuous.

That doesn’t say it’s discrete. Only that there is a limit to precise measurement.

> That doesn’t say it’s discrete.

Possibly not discrete, as we envisage it - the small scale does not usually follow human intuition at all.

Though I would say that "there is a limit to measurement" of length and time entirely. Not just to accurate measurement.