If B equals number of breasts visible separately, and S equals a stiffened undergarment supporting those breasts then
2B + 0S = Medieval
1B + 1S = Early Modern
2B + 1S = Modern
Postmodern-ironist, which sees truth as socially constructed - breast implants
Scientific-rational, in which truth is found through methodical, disciplined inquiry - sports bras
Neo-Romantic, in which truth is found through attaining harmony with nature and/or spiritual exploration of the inner self = no bra