The important things are that: a) it is economically rational to mine on the correct chain b) there are substantial economic net costs to mining on a wrong fo

The important things are that: a) it is economically rational to mine on the correct chain b) there are substantial economic net costs to mining on a wrong fork of the chain (and these are high enough that it is prohibitively expensive to mount an attack which would fool people as to what chain is correct) Right?