<p>nickler answered this on IRC.</p>
<blockquote>
<p>In a mixed network, the rules can become active, but in two separate chains because lot=true nodes will reject blocks from the lot=false chain which doesn't require 100% signaling.</p>
</blockquote>
<p>The MUST_SIGNAL <a href="https://github.com/bitcoin/bips/blob/master/bip-0008.mediawiki#state-transitions" rel="nofollow noreferrer">phase</a> (when lot=true) overlaps with the last two weeks (2016 blocks) of the STARTED phase (when lot=false). In the case that the threshold of miners signaling is met (but not 100 percent of miners signaling) during these two weeks you don't want to create a chain split between lot=true and lot=false nodes for no reason. If MUST_SIGNAL enforced 100 percent signaling and there wasn't 100 percent signaling during this period you would get a chain split between lot=true and lot=false nodes.</p>

CC BY-SA 4.0
2021-02-25T13:26:04.193Z
2021-02-25T13:26:04.193Z
Michael Folkson
<p><a href="https://github.com/bitcoin/bips/blob/master/bip-0008.mediawiki#new-consensus-rules" rel="nofollow noreferrer">BIP 8</a> states that:</p>
<blockquote>
<p>During the MUST_SIGNAL phase, if (2016 - threshold) blocks in the
retarget period have already failed to signal, any further blocks that
fail to signal are invalid.</p>
</blockquote>
<p>Why doesn't it enforce 100 percent signaling during the MUST_SIGNAL phase rather than merely the threshold?</p>

<soft-fork><taproot><activation-mechanism><bip8-version-bits>
Why does the threshold apply to the MUST_SIGNAL phase in revised BIP 8 (lot=true)? Why doesn't it enforce 100 percent signaling?
Michael Folkson
# Why does the threshold apply to the MUST_SIGNAL phase in revised BIP 8 (lot=true)? Why doesn't it enforce 100 percent signaling?

(Asked by: username_0 on 2021-02-25)

[BIP 8](https://github.com/bitcoin/bips/blob/master/bip-0008.mediawiki#new-consensus-rules) states that:

> During the MUST\_SIGNAL phase, if (2016 - threshold) blocks in the
> retarget period have already failed to signal, any further blocks that
> fail to signal are invalid.

Why doesn't it enforce 100 percent signaling during the MUST\_SIGNAL phase rather than merely the threshold?

**Tags:** soft-fork, taproot, activation-mechanism, bip8-version-bits


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## 1 answers

### Answer by username_0 on 2021-02-25. Score: 1 | Accepted answer

nickler answered this on IRC.

> In a mixed network, the rules can become active, but in two separate chains because lot=true nodes will reject blocks from the lot=false chain which doesn't require 100% signaling.

The MUST\_SIGNAL [phase](https://github.com/bitcoin/bips/blob/master/bip-0008.mediawiki#state-transitions) (when lot=true) overlaps with the last two weeks (2016 blocks) of the STARTED phase (when lot=false). In the case that the threshold of miners signaling is met (but not 100 percent of miners signaling) during these two weeks you don't want to create a chain split between lot=true and lot=false nodes for no reason. If MUST\_SIGNAL enforced 100 percent signaling and there wasn't 100 percent signaling during this period you would get a chain split between lot=true and lot=false nodes.


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