Summoned monsters and shadow conjuration

[ShadowcatX]

If you summon a monster with a summon monster spell, and that monster has shadow conjuration, is that monster prohibited from using shadow conjuration to mimic a summoning spell?

[VRMH]

"A summoned monster cannot summon or otherwise conjure another creature".

I think they can't use shadow conjuration either, but if you take the words "summon" and "conjure" in their strictest definition it wouldn't be against the rules; shadow conjuration "creates" creatures, it doesn't summon or conjure them.

[mplindustries]

Shadow Conjuration is not a conjuration or a summon spell--it's an Illusion--so it works perfectly fine. There's no semantic games necessary.

[Natural 1s]

What is then purpose of the phrase: "...or otherwise conjure..."?

1) Maybe it refers to conjuration / calling (as in Planar Binding) and any other possible future conjuration subschools.

2) Or it is also intended to cover illusion / shadow and RAI want to restrict chain summoning (every summoned creature will generate another one). I think this is the case so I will use it as house rule.