Willie71 wrote:laklak wrote:What does "trust our senses" mean? If I smack somebody upside the head with a 2x4 it fractures their skull. This happens whether the recipient trusts their senses or not. Our senses are all we have to trust, and they've worked fairly well to approximate "reality" for the last couple of million years.
Spooky action at a distance, gravity bending light, light being a wave and particle, observation changing outcomes from probability to certainty, or even turning back time are all contradictions to our senses. We see limited wavelengths and can't detect dark matter beyond gravity. Experiments in perceptual psychology show us repeatedly how fallible our senses are. I would think that anyone who believes in a heliocentric solar system would not trust their senses as the sun moves across the sky. We need multiple tools to aid and assist our senses to understand our universe. On our own, we are pathetically limited.
It's possibly better to phrase the things you started off by listing as maybe largely not being entirely consistent with our everyday experience and knowledge extracted from that experience, rather than contradicting our senses.
We don't really have a 'sense' of light travelling in straight lines. Our visual systems may implicitly rely on it, and it may be something we have been explicitly taught, or are able to observe in certain limited circumstances.
We can see beams of sunlight in misty or dusty air appearing [apparently] straight, but if we don't understand about refraction, we'd also see angled sticks appearing to 'bend' when they are dipped in water as a case of light
not travelling in straight lines, if we believe the stick isn't actually bending; it's only at a reasonable stage of scientific competence that we realise it's effectively travelling in two different successive straight lines.
As for light having both wave and particle natures, surely we don't really have a 'sense' of either until we start asking the relevant questions and doing experiments, so there's not really anything to
be contradicted. At least not before, again, we achieve reasonable scientific competence.
And on the way to such competence, we learn that all
manner of things on a continuum of 'weirdness' are not as, or at least not quite as, or always as, we may have once expected, not simply to do with limitations of our sense, but significantly to do with the relatively narrow range of physical conditions we encounter while living a normal life. I'm not sure there's anything fundamentally special about the apparently weirder things, it's just that they are more weird than the less-weird ones.
As for 'observation changing outcomes from probability to certainty', that isn't necessarily particularly mind-blowing, as it maps fairly well onto the common-sense idea of an outcome not being known until someone knows it.
Sure, it comes along with a different idea of what 'observe' actually
means, but once someone understands that that word is being used differently, it rather seems to take much of the sting out of the 'surprise', as it's not actually talking about observations in the everyday sense
at all. Observation could just have usefully been called something like 'settlement' or 'condensation', and someone saying "'
Settlement' is what we call the transitioning of a probability into a certainty, and it happens at basically the point where certain kinds of physical interaction happen.", would seem fairly unlikely to shock anyone.
I don't do sarcasm smileys, but someone as bright as you has probably figured that out already.