Look, if I have a photograph maybe plus video of someone walking outside the house then in a way that's "proof." That he walked outside the house. Maybe not enough proof in a court of law if a person is accused of something. Someone could come up with the idea that it was manufactured, tampered with. But that's not the point because we're talking about consciousness. I'm assuming we're conscious when we type a message. I don't want to get too technical here. I can't say mushrooms are conscious. I can say that they can flourish under certain conditions. I do not believe or think this means they are conscious, but like salamanders, they have cerrtain innate, GOD-GIVEN abilities to respond to stimuli. Can I prove this? No, but it makes sense to me, while the theory of evolution pertaining to these things do not as if thinking ability developed naturally by chemical forces.
Like I said, when I approach a cockroach I see it senses that something is near. Frankly, I don't think it sees me. I don't know, I'm not an expert. But it sure can run away faster than I can catch it most of the time. I believe (yes, believe) what my science teacher taught me, that there is a difference between thinking and instinctual reaction. I do not make my heart beat, for instance. I don't think about every beat there is. It's automatic. I don't think in advance about the time and date it will stop beating. I try to eat in such a way that will not harm it. Yes, thank science for this.
This in reference to what I think about vegetables thinking, or salamanders thinking. I am going to go as far as gorillas. Their brains are different from human brains. I'm pretty well sure of that.
P.S. I don't think salmon think too much, if at all. But I won't get into that now. I also don't think bears think too much about catching fish. Maybe they think more than salmon, I don't know. (Do you?)