Jim - Suppose we have a blindspot. If we behave in a way that suggests to a researcher (or to ourselves) that we can sense what is in our blindspot, then it must be because we've experienced a feeling or intuition as to what is there. Otherwise our answer would a wild guess and would show up as such. We may not know how we are doing it, but if we can do better than blind chance then we are experiencing a sense of what is there and this is guiding our answers.  We may not know whether this feeling or intuition originates in a message from the physical senses, it may not, but we would have to be aware of it, experience it, before we could use it to guide. Without such an experience we would be sticking a pin in a dictionary. Even if we are wholly unaware of any sensory experience relevant to the answer we are perfectly aware of being unaware of any. So at the moment I don't see the blindspot argument as evidence for unaware experiences, just for experiences of which we're not normally aware because we don't normally have a researcher asking us to focus our attention on them. But I suppose there's a counter-argument, as always.