Sure thing. I think there's some talking past each other, so I'll provide quotes with a bit of discussion.
@De Jager has given some statements of clarification along these lines. Especially post #71.
Some prefatory comments:
1. "False" and "Contradicts the RPW" are distinct. The proposition "a carbon atom weighs 1 kg" is false, but does not contradict the RPW.
2. Principle and application are distinct. Since the RPW is a principle, it might be abused in application, but an abuse of the principle is not a contradiction of the principle.
3. Some language used has been less than clear, and less than ideal. When IP folks say "show me the limitation" it is poor language because it looks at a quick glance like they are presuming universal acceptability in the absence of limitation. The actual position is that they view their as having been a command, and EP as more restricted than the command, and to go
narrower than what God has commanded at one time requires another positive command from God. If I am reading
@Reformed Covenanter correctly, this is actually his argument - that the command about praise is generally broad to inspired words, but has been positively restricted for this period of redemptive history to the Psalms only (making it a redemptive-history argument, not an RPW argument). But again, if the RPW is framed as a "principle," then both IP and EP are agreed in not adding to God's command. They disagree only about what God has commanded.
Quotes with some discussion below:
Minor premise:
God has commanded singing in fulfilled language. The command is given via example in Rev. 5:9. RPW is not contradicted.
Minor premise:
God has commanded singing "Psalms, hymns, and songs." "Psalms, hymns, and songs" is an inclusive term. The command is given by precept. RPW is not contradicted.
Explicit statement of the IP argument: "
The Bible commands." RPW is not contradicted.
Same as above. "
We are commanded." RPW is not contradicted.
Same again, in clarified form. The difference is "application," not the principle itself. It's a matter of minor premises (substance of command), not major premises (principles of worship).
This is post #71 I referred to above. Izaak helpfully distinguishes between the principle (RPW) and its application (substance commanded). As stated, the IP argument may be wrong about the substance of the command, but "
he believes God has commanded." RPW is not contradicted.
Minor premise: "psalmos" in Col. 3:16 refers to a category including uninspired songs.
God has commanded that psalmos. Command is by precept. RPW is not contradicted.
Same as above. This is really just more exegetical detail about the substance of God's command. It's premise:
God has commanded "Psalms, hymns, and songs" by precept. Biblical data assembled to support the definition of those terms as broader than the Psalter. RPW is not contradicted.
Minor premise:
God commands praise that is not Psalms. Command is by example. RPW is not contradicted.
Minor premise:
God commands singing psalmoi. Psalmoi includes more than the Psalter. Command is by precept. RPW is not contradicted.
Minor premise:
God commands the Word in its content, through singing. Command is by precept. RPW is not contradicted.
Minor premise:
God commands more than Psalms in worship. Command is by precept. RPW is not contradicted.
Minor premise:
God commands more than Psalms in worship. Command is by precept. RPW is not contradicted.
Now, every minor premise asserted by the IP advocates above might be false. It might be a misinterpretation of Scripture. But every single one proceeds from the grounds of the major premise that we are to do what God has commanded without addition or subtraction. So every single one seems to clearly have demonstrated its compatibility with the RPW, and its lack of contradiction with the RPW. The IP position can be false, and still not contradict the RPW.
But unless I'm really misreading what has been said, the argument proposed is very, very clearly on the ground of "
God commands" and never on the ground of "God didn't forbid." I see three possibilities. 1) The IP argument has demonstrated its adherence to the RPW, and the critique of it should be exegetical or redemptive-historical. 2) I misunderstand the RPW. 3) I misunderstand the IP argument.
I think the case is (1). That doesn't make IP correct. It does make objections to it via the RPW wrong and rhetorically overblown.