

As a small aside “Open Source Free Trials?” If it’s open source, can’t they just disable the trial part?
Yes. There’s a number of projects which distribute binaries which aren’t as liberally licensed as the source they’re built from. E.g. Ardour is another one. There’s a demo version, subscriptions start as low as $1/month, $45 buys you the current major version and the next major version with all its updates, perpetual license. There’s also the implicit understanding that if you don’t pay up and want support, your bug reports better be developer-grade.
Basically it’s a way to get artists who are used to either freeware or commercial offerings to donate. Also as far as DAWs go it’s a fucking steal.
We already can detect direction of infrared radiation, it’s called being warm on one side but not the other. Technically also possible by, say, lying half-way under a blanket and half-way not, but sensory integration takes care of the ambiguity.
More interestingly, did you know we can see the polarisation of light?