i have 2 main questions

Latent variables are unobserved variables that are measured by multiple observed items(called manifest variables).

**now my questions:**

1- each latent variable is an unobserved variable

are all unobserved variable called "latent"?

2- each manifest variable is an observed variable

are all observed variable called "manifest"?

In other words, are always these equations true:

1) latent variable = unobserved variable

2) manifest variable = observed variable

thanks!