 FAIR: During Data and Picards phaser fight inside the holoship, the  disruptor shots from the Sona weapon do not disrupt the holograms  as we see the Sona Commander do later in the movie to reveal that  was fooled. In fact, they chip walls and splash water. However, the  holoship was designed to be a floating holodeck to transport  unwilling colonists, so the simulation would likely be programmed to  react in a realistic manner to weapons fire so that the deception  isnt accidentally discovered; likewise, the crew of the Enterprise  may not have had time to reactivate the reality mode when they  changed the simulation.