[pcgTheDestroyer]

For example, how could Catholics pray for intercession of someone who is not in heaven?

Something I don't understand: how can Catholics pray for intercession of someone who is not Jesus Christ, the only intercessor (as per Romans 8)? If you'd rather not get into it here, I understand, but your statement just stirred up that thought in my mind.

[Mike Fieschko]

Something I don't understand: how can Catholics pray for intercession of someone who is not Jesus Christ, the only intercessor (as per Romans 8)?

I suppose on the same grounds that Paul asked the Ephesians to intercede for him (Eph 6:18-19 KJV).

18 Praying always with all prayer and supplication in the Spirit, and watching thereunto with all perseverance and supplication for all saints; 19 And for me, that utterance may be given unto me, that I may open my mouth boldly, to make known the mystery of the gospel,

There are other reasons, but that's the first New Testament reference I thought of.