To my mind, almost the entirety of the issue hinges on the meaning of the word “dokimazo” in 1 Corinthians 11:28. This article (ht David McCrory) argues for paedo-communion on the basis of its understanding of the context and historical situation of the Corinthians when Paul wrote the letter. The specific section is about two-thirds of the way down the article under the title “Some specific objections; a. children cannot prove themselves.” I would suggest that the article does not do the word “dokmazo” justice at all. BDAG has this definition for the word, “to make a critical examination of something to determine genuineness, put to the test, examine,” listing this passage under that definition. What is one to make a critical examination of? The answer is “heauton” (oneself). Quite simply, it is eisegesis to claim that zero subjective aspects are attached to this examination.
BOQ It is possible for a covenant child, when tested (cf. I Cor. 10:13), to demonstrate by his words and behavior that he is living a godly life which seeks the approval of God. Such faithfulness can be observed even in a young child by both parents, elders, and other members of the church. EOQ But even this would require that the child no longer be an infant. Don’t get my position wrong. I think that children of age 6 are capable in some instances of such examination. I think other children of age 15 are incapable of it. This is where the session of the church is so important. But the article does not do justice to the definition of “dokimazo” in BDAG. The best article I have ever read on the passage dealing with paedo-communion is by George Knight. It is available in the Auburn Avenue Theology: Pros and Cons volume, available here.