There is passage in her book that talks about the use of a dummy or not, and she actually says this that some research has shown that the use of a dummy may prevent SIDS, but she finds the negative outcomes associated with the use of a dummy outweighs the possible benefits of one'..............WHAT??????

Did she just write that????? The 'possible' benefits being to keep your child ALIVE????? WTF?
whilst I am by no means a fan of Tizzy's recommendations, I think the above statement is alluding to the fact that the use of dummies often causes breastfeeding problems, and lack of breastfeeding contributes to illness and sids in babies. So the decrease in risk by using one could be negated by the risk of not breastfeeding, ifswim.