What is Scripture weighting?

Can you guess which type of Scripture weighting applies to the following from gotquestions.org:

Question: “Does 1 Peter 3:21 teach that baptism is necessary for salvation?”
Answer: As with any single verse or passage, we discern what it teaches by first filtering it through what we know the Bible teaches on the subject at hand. In the case of baptism and salvation, the Bible is clear that salvation is by grace through faith in Jesus Christ, not by works of any kind, including baptism (Ephesians 2:8-9). So, any interpretation which comes to the conclusion that baptism, or any other act, is necessary for salvation, is a faulty interpretation.

Did you read that carefully? “We discern what it teaches by first filtering it through what we know the Bible teaches on the subject.” Says who? It’s circular reasoning. How can we know what the Bible teaches on a subject by doing any “filtering” of passages? They advocate relegating certain passages as “less than” others (e.g. scripture weighting). And, who or what determines the passage to be used as the filter?

This is classic presupposition. In this example, the doctrinal position is “faith only” and is based on a single, lifted passage –

. The last sentence may as well read, “So, any other passage which teaches that baptism, or any other act, is necessary for salvation, should be discarded.”

Hopefully, we can deal with Scripture honestly. Looking at what it says. Putting it in the proper context. Gathering any/only/all passages that might apply without Scripture weighting or disqualifying any part of God’s word.