More importantly , we cannot always afford to gather enough recurrent evidence to justify inferring a true causal connection .
更重要的是，我们往往承受不起收集足够多重复性证据的代价，来证明一个真正的因果联系推断是正确的。
Your sudden attractiveness does indeed have an economic explanation : your new admirers are rationally inferring information about you from the behaviour of your partner .
