Bottom-up processing is not thought to be a very efficient way to approach a text initially, and is often contrasted with top-down processing, which is thought to be more efficient. Example. Asking learners to read aloud may encourage bottom-up processing because they focus on word forms, not meaning.
Had Titanic hit the iceberg head on, it is likely that there would be massive crushing of the fore part of the ship, which may have prolonged its end, since theoretically while it may have begun to go down by the bow, the center and aft compartments would have stayed dry for a longer period of time.
RMS Titanic (ship) hard to say, ice is not totally solid and the titanic was made of metal that has some give. So a head on collision would have been absorbed to some extent by the iceberg fracturing and the rest by the bow of the ship crumpling. How far it would have crumpled is a matter of speculation.