A strict 2PL protocol has both a growing phase and a shrinking phase. In the growing phase, it acquires locks; in the shrinking phase, it only releases shared locks. The exclusive locks are released after the transaction commits.
=> There can be no dirty reads by other transactions.
=> No cascading rollbacks or aborts.
The basic timestamp ordering protocol enforces conflict serialisability.
Thomas write rule enforces view serialisability. It does so by ignoring the blind writes. The blind writes are meaningless operations that prevent a serial to be conflict serialisable; but by ignoring them, we can make them view serialisable.
Hence, both are true.