The virtue of the yaller dog is his bark. To hear that bark and not see the barker would make one imagine that he did the biting for all dogdom: but seeing the source one only says, “Poh, it's the yaller dog !”

Would you like that drink up or on ice?

That is, the observed covariance between indicator y₁ and y₃ would mirror the understandable causal behavior of the corresponding underlying latents.

Let me see your portous, gentle sir John.