Don't take the bait! Debating someone with zero credibility or validity only helps them to gain status and spread lies.
By trying to negate their false ideas, you'll end up activating them. They win by making the difference between lies and truth seem like a matter of opinion.
Can embryos that never saw teratogen help ones who did, to complete normal development? etc. We also characterized some amazing calcium waves that reveal embryos' linkage during damage (see Lance Davidson's cool work on a very related topic: https://t.co/7z7yfvyVCA)