Even at word level, meaning activation is automatic if the reader has the equivalent oral vocabulary. The reader decodes 'boat'. If the reader knows what a boat is, the meaning is understood without needing discovery. The picture and context, however, might clarify which 'boat' type is intended, or the reason for the boat being in the text. Context will also clarify the meaning of words which can be pronounced differently with different meanings - like the proverbial 'wind' 'wind' and 'read' 'read'. But a reader needs to be able to decode/read any word in isolation without a range of clues based on illustrations, context or deduction.