grammatical point I'm confused by '' when sensItively deployed'' in this context! I my opinion the phrase should have been written this way: when they are sensItively deployed! is there any grammatical point which allows us to drop '' they are'' in some situations? High-tech tools can supplement, if they cannot replace, the voice of an artist now silenced. They not only help conservators understand how a work was made but, when sensItively deployed, can help them recover the living artist from the evidence of the mute painting. Thank you