It is true if the rules come into play.
Those rules specifically relate to online PVP experiences.
Sony have ruled out PS4 players playing PVP at 30fps with Pro playing at 60fps.
Tomb Raider has no PVP so it's exempt from those rules.
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They could also do 30fps on pve if it's open world and 60fps on pvp because that won't b open world, just like the new gran turismo where it's 60fps @ 1080p but in the replays it's 30fps with much more detail They can change frame rates for game modes
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Conceptually that is possible but if it's a game both on PS4 and PS4 Pro then any PVP element can't be at a higher fps than PS4.