Here's a quote from Hume: "Nothing, that is distinctly conceivable, implies a contradiction." My question is this: what is the difference between something that is logically a contradiction and something that happens to not be instantiated? For example, ghosts do not exist. Could you explain how the concept of a ghost is not a contradiction? Thanks ^^

What is an instantiated concept in philosophy? My class has a question asking TRUE or FALSE: A sphere made of solid gold is an instantiated concept. However, I am confused as to what they mean by that term. If someone could help me better understand that would be great!

Is existence a property? The way I became confounded was an example like this: a phoenix is a bird, it has feathers, and it is born from ashes, but it does not exist, whereas a penguin is a bird, has feathers, exists, and is born in snow. As in, existence and being born in snow are properties of penguins, but not of phoenixes. I feel there might be some mistake, but I certainly lack the expertise to puzzle through this on my own.

According to Heidegger philosophy has never really asked what we mean by "Being". According to him we ask what the essence of this or that form of being is but we never concern ourselves with being proper. Perhaps what Heidegger means or alludes to in this question is the idea that the very fact of being is in some way the very essence of being. This reminds me of Fichte's idea of the fact of consciousness rather than a principle of consciousness as the starting point of philosophy. And yet this fact of being just like the fact of consciousness is mysterious and elusive, while paradoxically present, and hence suppressed by a reductive urge within philosophy. Yet, I'm kind of skeptical about Heidegger claim of a suppression within philosophy of the question of being. It seems as if the question of being was first made problematic far further in the German tradition than Heidegger, as early as Kant, if its not something that has always been with philosophy. Kant argued very much like Heidegger, I think,...

Is "exist" an overburdened word? We say that ideas exist, processes exist, and substances exist, but doesn't "exist" mean something different in each case? When we say a particular apple exists, we mean the apple takes up space in the world. When we say the sport of baseball exists, we mean there's this process that people could enact. When we say the color red exists, we mean that there's this shared subjective experience that arises from certain stimuli. When I think about whether or not certain things exist, e.g. mind, time, morality, etc., it's really tricky to know which standards to apply, that of processes, materials, or ideas. Might it be more useful to say that substances exist, processes occur, and ideas arise? Then whether or not the mind exists wouldn't even be a valid question, any more than asking whether apples occur or baseball arises. I suggested this to a professor of philosophy who's dating a friend of mine, and he said he didn't think reserving a special meaning for "exist"...

Does the word 'being' have a meaning?

When discussing kinds of terms, there are certain kinds that come up often. Singular entities such as Queen Elizabeth II are one kind, categories such as cats are another, and properties such as blue are a third. However, what about substances like "gold"? Is a gold watch an instance of the property of being gold, or being made of gold? Or does the watch simply contain trillions of elements in the category "gold (atoms)"? Or is "gold" a singular entity that exists scattered throughout the Universe? Or are substances an entire category to themselves?

If under possible world semantics one was to assert 'it is possible that there be an orange elephant'. Is one to be understood as saying that there is an object which does not exist in this world but does in another that is an orange elephant. Or is one to be understood as saying that an object in this world (presumably an elephant) is orange in another?

In describing Kant's idea of the "thing-in-itself" Thomas Pogge (in response to a recent question on this site) recently wrote that "According to this explanation, space and time are then features only of objects as they appear to us." I'm having a difficult time deciphering this statement. To me when you speak of a feature of an object you are referring to that object in-itself almost by definition. It seems like space and time could be either a feature of the world or a feature of our mind/cognition or psychic tendencies which we project onto the world but not both. To say that space/time is a feature of the world as it appears seems to involve a confusion of how language is used to speak about being. Appearances can reveal or distort being but I don't see how they can contribute to being. We don't speak of colors as features of the (outer) world as they appear to us do we? We try to figure whether colors originate in the mind or in the world and though we allow that there is some degree of interaction...

There is a child that is 5 years old, 4ft tall, likes toys, is of average intelligence, and believes in santa clause. 40 years pass and the child is now a man 45 years old, 6ft tall, doesn't like toys, is a physicist, and does not believe in santa clause. are the child and the man two distinct beings. or are they the same being? if they are two distinct beings then could the 5 year old child be classified as "dead" since he is now non existent (replaced by a completely different individual).