![]() I'm aiming to publish 0.91 around the end of September, with a public preview sometime before that. This week I made a decision I'd like to share with you: we'll be reducing the scope of update 0.91 in order to get it out to you faster. Can somebody remind me why I decided to make this game multiplayer? My current task is sorting out the various networking issues with the game. I haven't been able to work on Logic World much this week, but in the time I've been able to carve out for it I've been plugging away at bugfixes and stability improvements. Be sure also to wishlist Logic World on Steam and join the official Discord. To make sure you don't miss the next blog post, you can sign up for our newsletter. We are on track for a 0.91 release in late September, and I expect we'll start public previews of the update next week. ![]() I'm VERY sorry those issues were in the game for so long, I know they've caused a lot of frustration :( And I also fixed the game not properly detecting supported network protocols, which was causing various nasty bugs that made the game unplayable in certain network setups or when no external network interfaces are available (#204, #333, #229, and others). #104 and #250 are no more (#104 had a pretty interesting cause, click to read my comment about it). Notably, this week I fixed some nasty simulation glitches that were plagueing Dynamic Components (components with a variable number of input/output pegs, such as AND gates). This has been made much easier thanks to Felipe's work on improving the issue tracker, thank you Felipe! In preparation for the release of update 0.91 - which I think I'm going to christen "The Less Buggy Update" - I've been hammering away on more bugs and stability fixes. This formula is true at states 0 and 1 but false at state 2, which can be expressed in the following notation (the 'double turnstile' $\models$ can be read as 'satisfies' or 'makes.Beating Up Bugs like they Owe me Money - Jimmy These sentences might be represented as $\Boxq)$ says 'there is a transition to a running-and-not-terminated state (i.e., to state 1)', or more naturally, that the program is able to run (or keep running). Worlds consistent with logic (= all worlds) The English sentences below show three kinds of accessibility relations at work: Rather, we're only concerned with a relevant subset of these possibilities-just those worlds which are accessible from the actual world via some implicit relation. Yet we're seldom concerned with every single possible world at once: when conversing about the current weather, things like pens and dinosaurs are typically far from one's mind. When one speaks of what may or must be so, we can view this as talking about what is true in some or all possible worlds. Let's illustrate this further with an example from linguistics. ![]() Regardless, if we have a proposition $p$ and current world $w$: On the one hand, possible worlds might be hypothetical 'alternate universes': there is the 'actual world', the way things really are at the present moment, as well as an infinity of other 'worlds' which differ in ways both subtle (such as a world where my pen is simply on the opposite side of my desk) and dramatic (such as a world in which dinosaurs still roam Earth in 2013 CE).Īlternatively, possible worlds might be the various states of a computer, a computer program, or another system which evolves over time. We can conceive of possible worlds in various ways, depending on what we're interested in modelling. Semantically, these modal connectives are interpreted with respect to possible worlds. Now, in modal logic, we add two new unary connectives to our familiar language: So once we've fixed a truth value for each of the propositional variables, the truth value of any formula using those variables is deterministic. Ī typical (long-form) truth table would look something like this (using 0 for false and 1 for true): To start out, let's briefly recall the language and semantics of propositional logic, i.e., connectives and truth tables. ![]() This app is a graphical semantic calculator for a specific kind of modal logic, modal propositional logic, which extends propositional logic but lacks quantifiers ( ∀ and ∃). Modal logic is a type of symbolic logic for capturing inferences about necessity and possibility.Īs with other logical systems, the theory lies at the intersection of mathematics and philosophy, while important applications are found within computer science and linguistics.
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