Mousethief, I think it means "Data changes when you examine it" What a crock! Backup your database!

Any cohesive, stratified, organized collection of data will, upon extensive and categorical analysis leading to devitalization, undergo a metamorphosis whose ultimate realisation is that the data set previously mentioned no longer bears any similitude relationship with its preanylised state.

Translation to pedestrian English left as an exercise for the reader.

Alex