Unspendable keys in descriptors

The message "What Pieter said. Plus not revealing it to the whole world by default doesn't make it unprovable." offers no clear points or topics that could be expanded into a blog post. It seems to reference a previous statement made by someone named Pieter and touches on the concept of proof without public disclosure. However, without additional substance, it's impossible to follow the rules given and craft a multi-paragraph blog post.

For a more effective summary or blog post, please provide a fuller email or content with distinct ideas and information that can be restructured and simplified according to the specified rules.