I think you’re overthinking it. This was the actual reported exchange:
Later in the interview, Rye attempted to demonstrate the Green Party’s failure to build power from a grassroots level. She asked Stein how many members of the House of Representatives there were.
“How many total are there? What is it, 600, some number?” Stein said, before Rye set the record straight.
I don't think anyone would fault you for saying there are 435 members of the house, especially because that number is also wrong (there are six additional non-voting members).
If she had answered more correctly than the number of voting seats I wouldn't have a problem with it...