1457253
Only in American usage! Thankfully, I am an Anglican infidel-smiter, so this construction is without sin.

1456784
Do you believe I'm a changeling? 'Cause you'd be wrong if you did! That would be laughable!

1457300
I have never believed any changeling to be a changeling until proven to be a pony.

I feel that that is a wise policy.

1457530
That is smart! You can't prove a negative, but if a changeling proves they're a pony, that's a positive assertion and so clearly logically meaningful.

Clearly, if I want people to take my changelingness seriously, I need to set about proving I'm a pony now.

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