Most plausible Psionic powers?

[Minuteman37]

So would it be possible to arrange psi powers into classes based on their plausibility and work ability under current physics?

[johndallman]

Not usefully. The categories are something like "thoroughly implausible" and "extremely implausible."

[Boomerang]

The technology already exists for humans to give machines mental commands. It isn't much of a stretch to imagine that same technology being developed further to provide the equivalent of psi powers at least in terms of functionality.

[Boomerang]

Another point that may be worth mentioning is that whilst science is a powerful tool for acquiring knowledge there is still much about the universe and ourselves we don't understand.

The mind-body problem is an example: how does something nebulous like a thought translate into a physical action like picking up an object? We assume that the mind can control the body because it is part of the same physical system and everything else, that we don't seem to be able to control, is not part of that system. But what if that assumption is wrong? What if the entire universe was one interconnected system in a real physical sense? Not in a Deepak Chopra mumbo-jumbo pseudo-science kind of way. If that were true you might be able to manipulate anything just by thinking about it in the right kind of way. Hello psi powers! If that's how the universe works then I would only rule out psi powers that blatantly break well established physics. For instance teleportation unless the actual travel is limited to the speed of light. As what happens when scientists teleport elementary particles in a laboratory.

[malloyd]

Originally Posted by johndallman

Not usefully. The categories are something like "thoroughly implausible" and "extremely implausible."

Still there *are* degrees. An obvious first cut is does it require more energy than a human metabolism (more than about 100 W)? Those are clearly more impossible than something that you could theoretically have the energy for, and eliminates much of the flashy stuff.

Probably the most plausible psi powers are the limited "ESP" kind - the ones that you could make a case are processing of information your senses could be gathering but humans just don't interpret - Empathy (smell based), or Dark Vision based on echolocation, or Clairaudience (only when you can directly see the noise source), followed by the ones that let you do things to your own body that it does normally do, but faster or better or longer - things like reacting faster (Combat Reflexes), stopping bleeding, purging poisons or diseases, surviving a hour in freezing water, not breathing for minutes at a time, or doubling your ST for a single action.

[kdtipa]

I'm curious about why we'd group them by plausibility. What's the goal in GURPS? Is this for a campaign setting? And if we're talking about the real world... none of the psionic abilities is plausible... because they don't exist and there are no known mechanisms that would support them as defined.

[jason taylor]

Originally Posted by kdtipa

I'm curious about why we'd group them by plausibility. What's the goal in GURPS? Is this for a campaign setting? And if we're talking about the real world... none of the psionic abilities is plausible... because they don't exist and there are no known mechanisms that would support them as defined.

It gives an idea of how much work is needed to backlog the ability into a given setting if it is desired.

[brianfb]

If your going to allow psi powers of any kind, including IMO dange sense, you have to accept that in your setting psychic abilities are real, but not yet understood (possibly because of the taboo stigma on seriously studying them) by science. From there it really depends on how far you are willing to run wit lh that.

I woukd allow things like:
Danger sense, empathy, precognitin, psychometry, etc.

I would not allow things that affect physical objects grossly such as tk, or pretty anything ending in kenesis.

[robkelk]

Originally Posted by brianfb

If your going to allow psi powers of any kind, including IMO dange sense, you have to accept that in your setting psychic abilities are real, but not yet understood (possibly because of the taboo stigma on seriously studying them) by science. ...

Why?

I know that there are some settings where this makes sense, but it appears to me to be in direct contradiction to the OP's question. Could you enlighten me how it isn't, please?

[ericthered]

There are two measures of 'realistic'

The first is 'which violates observed physics least'

The second is 'which is in greatest conflict with observation so far'

The difference is the degree of surety you place on known physics. Seeing the future, for example, is one of those things that violates observed physics the most while violating human observation the least.