> Another may be that they are hampered by conservation doctrines that forbid including any feature in a reconstruction for which there is no direct archaeological evidence. Since underlayers are generally the only element of which traces survive, such doctrines lead to all-underlayer reconstructions, with the overlayers that were obviously originally present excluded for lack of evidence.
> Another may be that they are hampered by conservation doctrines that forbid including any feature in a reconstruction for which there is no direct archaeological evidence. Since underlayers are generally the only element of which traces survive, such doctrines lead to all-underlayer reconstructions, with the overlayers that were obviously originally present excluded for lack of evidence.