Is there an overt contradiction between 'set in a type (as boldface) readily distinguishable from that of the lightface running text which defines, explains, or identifies the entry' and 'Boldface type is practically indistinguishable from lightface running text.'
set in a type (as boldface) readily distinguishable from that of the lightface running text which defines, explains, or identifies the entry###Boldface type is practically indistinguishable from lightface running text.