Question: Let A and B denote languages. Statement: If A / in PSPACE then A is intractable. Is the statement true? Statement: If A is PSPACE

Let A and B denote languages.
Statement: If A / in PSPACE then A is intractable.
Is the statement true?
Statement: If A is PSPACE-complete and P = PSPACE then A is intractable.
Is the statement true?
Statement: If NL = PSPACE then P = EXPTIME.
Is the statement true?
Statement: if TQBF / in NL then PSPACE = EXPSPACE.
Is the statement true?
In the formulation of the time-hierarchy theorem, there is a logarithm used, unlikein the space-hierarchy theorem. Explain briefly the reason.

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