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Worth mentioning is that a power supply (like anything else) is only as strong as it's weakest link. Sometimes careful examination of the components will reveal an opportunity to get more out of something - but only sometimes.
Sometimes we get by in connecting a 30 ma load to a 10 ma supply because the 30 ma represents a peak that is seldom reached and the 10 ma is a continuous rating. Sometimes we can make the 10 ma supply work by not pushing whatever it is so hard. An example might be a 300 watt amplifier that we might want to run on a power supply that falls short of requirements - we might simply limit how far up we turn the volume as a way of managing the inadequate supply.
Transformers are one of several components that can be stretched, so to speak. I know that a transformer designed for continuous commercial service can be used at levels twice it's design if used in intermittent amateur service. It really doesn't put out any more - it's just that we've put it to work in a situation that is less demanding.
Wire is another one of those where how much current it can carry depends on a number of things. A 12 ga wire in a conduit is rated at less current than one in open air - presuming of course that voltage drop isn't the issue.
Sometimes the answer is "try it and see" but this applies only if the result of failure is acceptable - not a fire, injury, death, costly, etc.
So the short answer is still "no" but I've offered a little more.