I guess what the OP means is that one definition of memory is that it is generated by your experiences. In this case the memory is the lack of experience (with

I guess what the OP means is that one definition of memory is that it is generated by your experiences. In this case the memory is the lack of experience (with a spider), because those genes keep you away from spiders. So it is possible that you can develop the RNA without seeing a spider, hence the opposite of memory.