747-400 RR Manual Engine Start

[QAVION]

I've noticed that some airline's AOM's manual engine start procedures use the wording....

"At 25% N3 or max motoring put the fuel levers to RUN"

How does the average 747-400 pilot interpret the "or"?

Maintenance engineers define "max motoring" as when the N3's stop increasing. If the pilots have the same interpretation, what's to stop the pilots selecting run at less than 25% if the N3's stop increasing at less than 25%? (If a lot less, putting fuel on may result in damage to the engine)

If you are meant to select RUN at 25% or greater, why don't they say that in the manuals?

Thanks.
Regards.
Q.