Keep the comparison useful

A question, correction or missing distinction?

A rule can look similar across leagues and behave differently in practice. If a comparison needs attention, tell us which passage and which source would help clarify it.

Prepare an email

This form checks your entries and creates an email draft. You must send the draft from your email app; the website does not submit it to a server. All fields are required.

Use 20–3,000 characters. Include the page title or link where relevant. Please leave out sensitive personal information.

Correspondence is handled as described in our privacy policy. Preparing a draft does not subscribe you to anything.