Behavioural: "If only defense" vs. ceteris paribus"

ive read both definitions, but cant seem to isolate the difference between these two. if only - if only something had or hadn’t happened ceteris-paribus - playing field changed in a way on one could have expected. schweser uses example of “if the fed didnt cut rates”. I think the fed example is throwing me off because i interpret the fed example as “if only” the fed hadn’t cut rates. anyone?

do a search on the forum… i believe it was answered before already,698938,702086#msg-702086

ahhhh beautiful…thanks eklypse