The kind of difference that matters

The argument in three lines

Two routes to one market are two views of one thing. Two views of one thing cannot show different content. So if the content genuinely differs, after everything ordinary has been ruled out, one of the two is not a view of that thing.

The reasoning is simple and the difficulty is entirely in the phrase after everything ordinary has been ruled out.

Why the ordinary causes have to come first

They are far more common, they produce identical symptoms, and they are cheap to eliminate. A reader who skips them will reach this conclusion regularly and wrongly, and a conclusion reached regularly and wrongly stops being acted on.

The general study lists them in the order to check. It takes about a minute.

What the case actually looks like

• Both pages freshly loaded, close together in time.
• The same signed in state on both, and you know which.
• The same page reached the same way, not two similar pages.
• A specific, identifiable difference in substance, not in appearance or in speed.

The check that settles it

Compare the address you are actually on against the copy of the set you hold, character by character, from the end as well as from the beginning. Not the first eight characters. The whole string.

This is the only check available to a reader that settles anything, and it takes longer than looking at the page, which is why it is the one that gets skipped. The shared head study explains why the beginning of the string is the part least worth reading.

What to do if it does not match

1. Stop using it. Not later, not after checking one more thing.
2. Do not sign in on it again, and treat anything typed into it as having gone somewhere you did not choose.
3. Get back to the set you hold and use one of those, from your own store rather than from any page.
4. Do not go looking for a replacement string, which is the state described in choosing in a hurry.

What this study will not do

It will not tell you that any particular address is or is not genuine. This site publishes three strings that were supplied to it and does not open them, test them or vouch for them.

What it can do is give a reader a rule that does not depend on trusting any page: the strings you hold are the comparison, and anything that does not match them is not part of the set as this site received it.

Why plurality creates both the risk and the check

The risk exists because a fourth string can present itself as a member of a set, which is only possible when there is a set. The check exists because holding three strings gives a reader something concrete to compare against.

A reader who holds the set has a genuinely strong position. One who knows only that several exist has the risk without the check.

The proportion to keep

This case is rare and most divergence is nothing. That is not a reason to be relaxed about it. It is a reason to make the ordinary checks fast, so that the attention is available when the ordinary checks come back clean.

The proportion this study is trying to establish

Rare, serious, and reachable only after the cheap checks. Each of those three words is doing work. Rare stops it being the first explanation. Serious stops it being dismissed. Reachable after the cheap checks tells a reader how to arrive at it honestly.

Pages that emphasise only the second word produce readers who see it everywhere and eventually stop believing it. Pages that emphasise only the first produce readers who never look. The proportion is the point.

What this study is not. It is not an assessment of any address, and this site makes no claim about the state or authenticity of anything it publishes.