What does $f(x\mid\theta)$ denote?
Isn't it interprets that- "here $\theta$ is known then what is the distribution of X for the known $\theta$?"
Then why in the book which i am reading wrote that -- "the function $f(.\mid\theta)$ is assumed known except for $\theta$?"
If $\theta$ is known then why will the function be unknown for $\theta$?
Again, if the statement of the book is true [i know, it is true but I am not understanding] then how is $f(.|\theta)$ known at every point except for $\theta$?
Again, why the is book using the notation $f(.|\theta)$ instead of $f(x|\theta)$ ? Why is the dot(.) being used instead of $x$? that is what does $f(.|\theta)$ symbolize?