What does this sentence mean??

Hi Alc24:

It would help to have more context, but I interpret it as follows:

The reader is going through a passage, and, to him, it loses logical continuity when the text goes into the example concerning "X."

Regards,
A-

That's what I thought it meant but can you say

I'm losing the logical thread

or would you say something else?

Thank you

alc24can you say
I'm losing the logical thread

Yes.

alc24would you say something else?

No. Not necessarily. But you could say, "I don't follow the logic" or "I'm not following the logic" instead.

CJ

Does it mean
"I'm straying from the original subject by bringing X up"

Thank you

Sometimes, but not always. You could be taking a tangent, or attempting to change the subject when the argument is not going in your favor!