How can these two rules be executed without circular error

[RouGang]

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rule CheckValues "Check the default values" salience 8 {
when
MF.IntAttribute == 123 && MF.StringAttribute == "Some string value"
then
MF.WhatToSay = MF.GetWhatToSay("Hello Grule!");
Retract("CheckValues");
}

rule CheckValuesV2 "Check the alternative" salience 9 {
when
MF.IntAttribute == 123 && MF.StringAttribute == "Some string value"
then
MF.WhatToSay = MF.GetWhatToSay("Hello Grule v2!");
Retract("CheckValuesV2");
}

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[caicaispace]

这是来自QQ邮箱的假期自动回复邮件。   您好，我最近正在休假中，无法亲自回复您的邮件。我将在假期结束后，尽快给您回复。

[newm4n]

Hi @RouGang

I don't really get what you're asking ?
Could you elaborate more ? Like.. Tell us what you're trying to do ?

[newm4n]

@RouGang lets discuss it here.