Mostly correct. In the Bitcoin whitepaper, “nodes” in the c…

Mostly correct. In the Bitcoin whitepaper, “nodes” in the core protocol description (Section 5: Network) are assumed to both validate and build blocks—that is, they mine: collect transactions into a block, work on PoW, broadcast the block, and accept only valid blocks. The paper then separately introduces Simplified Payment Verification (SPV) clients that do not fully validate or mine.