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From an evolutionary standpoint, homosexuality is an unfavorable trait.

There are traits, which are unfavorable to the individual in terms of spreading his genes, however, benefitting the population. Homosexuality can only be assumed to be unfavorable in terms of spreading one's own genes and also only if it is exclusive (cf. Ancient Greece).
7 supporter.

Changing your gender/sex is unnatural

Okay, let me rephrase. By some definitions of "natural", changing sex indeed isn't. However, without specifying the definition of "natural", the argument is meaningless.
7 supporter.

Changing your gender/sex is unnatural

It really depends on your definition of "natural". By some quite common definitions of "natural", almost nothing a human does is natural.
6 supporter.
1 fallacy report.
Fallacy Of Red Herring

Functional programming is not useful for most apps

Y-combinator founder has noted that his and associate's choice of Lisp as basis for one of the first online webstores, had allowed them to beat others by (among other) implementing any new features way faster than competition due to the language used.
4 supporter.
1 fallacy report.
Appeal To Authority

Bug-free software is possible

Why not. However, programs mostly rely on other programs ( your code -> your interpreter/compiler -> libraries -> OS -> firmware) and all of that relies on hardware. Any of these can have bugs, there are hardware failures and poorly implemented or just worn down hardware.
4 supporter.

Taxation is not theft.

You only possess any property insofar as it is defined and protected by laws of your country. The same laws also include concepts and rules of taxation. Either your property is not yours or taxation -- as long as it is implemented the way it is stated in laws -- is just as legal as property.
4 supporter.

Taxation is not theft.

Property as a concept requires a society which agrees on what is considered property and enforces your right to it. Without that, you have no property, but just things that you happen to have on you or where you live, and anyone (stronger) can take them from you with impunity.
3 supporter.

Evolution is not observable.

That's total nonsense. You take creatures, whose lifespan is very small and you can observe evolution across generations quite well. The most famous example is possibly fruit flies.
3 supporter.

All information should be free.

There are expenses involved in creating information. Unless these expenses are met, there is no incentive for many kinds of information.
3 supporter.

Socialism is more effective at poverty reduction and ensuring the meeting of basic needs than capitalism

Buying a decent pair of shoes was a QUEST in the USSR, which you would mostly FAIL. Not to speak of luxury items such as a car, which most couldn't afford, and those who could, were to stand in line for it for 5+ YEARS. It is really really hard to imagine how bizarre it was living in the USSR.
2 supporter.