Recently I changed some of my basic opinions about life, in large part because of interaction with LessWrong (mostly along the axes Deism -> Atheism, ethical naturalism -> something else (?)).

It inspired me to try to summarize my most fundamental beliefs. The result is as follows:

1. Epistemology

1.1. Epistemic truth is to be determined solely by the scientific method / Occam's razor.

1.2. The worldview of mainstream science is mostly correct.

1.3. The many religious / mystical traditions are wrong.

1. Philosophy of mind

2.1. Consciousness is the result of computing processes in the brain. In particular, if a machine would implement the same computations it would be conscious. However, in general I don't know what consciousness is.

2.2. Identity is not fundamentally meaningful. However, there might be useful "fuzzy" variants of the concept.

1. Metaethics

3.1. Humans are agents with (approximately) well-defined utility functions.

3.2. The moral value of an action is the expectation value of the utility function of the respective agent.

3.3. I should take actions with as much value as possible. This is the only meaningful interpretation of "should".

1. Ethics

4.1. Human utility functions are complex.

4.2. I cannot give anything close to a full description of my utility function, but it seems to involve terminal values such as: beauty, curiosity, humor, kindness, friendship, love, sexuality / romance, pleasure... These values are computed on all sufficiently human agents (but I don't know what "sufficiently human" means). The weights for myself and my friends / loved ones might be higher but I'm not sure.

Less fundamental and less certain are:

1. Metaphysics

5.1. UDT is the correct decision theory.

5.2. Epistemic questions don't make fundamental sense (I realize the apparent contradiction with 1.1 but 1.1 is still a useful approximation and there's also a meta-epistemic level on which UDT itself follows from Occam's razor) as opposed to decision-theoretic questions. Subjective expectations are ill-defined.

5.3. Temark's level IV multiverse is real, or at least as "real" as anything is.

I'm curious to know how many LessWrongers have similar vs different worldviews.