[tor-talk] Why would authorities fall back to "1"?

[Sebastian G. <bastik.tor>]

From
https://gitweb.torproject.org/torspec.git/blob_plain/HEAD:/dir-spec.txt

I wanted to learn what consensus methods are. Below the desired
information i read:

"Before generating a consensus, an authority must decide which consensus
method to use. To do this, it looks for the highest version number
supported by more than 2/3 of the authorities voting. If it supports
this method, then it uses it. Otherwise, it falls back to method 1."

Let's say more than 2/3 support "14" and one supports "13". The last one
wouldn't use "14" because it does not support it, but why would it fall
back to "1"?

Well it makes sense that some don't use "14" if more than 2/3 only
support "13". Therefor "falling back" on "13" is fine.

In other words. Why doesn't the one that supports "13" use "13"? The
authority could decide that "14" > "13" and safely use "13".

Regards,
Sebastian (bastik_tor)