But he was already onto his new line of thought.

But today she had trouble following one line of thought, never mind two.

But the information he had already received was enough to set in train a new line of thought.

It was hard to focus on this line of thought.

He took a moment to consider this new line of thought.

She didn't like what that particular line of thought was saying about her.

She said the judge seemed to follow the same line of thought.

I stopped that line of thought, as something changed around us.

However, I do not agree with this line of thought.

But it started him on a new line of thought.