A full node is a node with the whole blockchain and is able to verify any new incoming blocks.
A pruned node, is a node with only some of the blockchain, namely it has removed some of the older blocks due to space requirements. A pruned node cannot validate blocks, as it does not have the full history of the blockchain right? So how can we still say that it is a full node?
Am I also right in saying that they do not serve any value to the network, as any blocks they send out will not be fully validated?