Nor between logic and mathematics.
There is also the idea that part of why philosophy is dismissed is because people tend to take results and say that the result isn't really part of philosophy.
Could this be because their idea of philosophy is that it has no results, so any results they are shown are concluded to be not part of philosophy?
Of course, philosophers often make use of results in mathematics. If you arbitrarily decide that any philosophical work that does this in some sense "doesn't count", then of course you will find that the remaining work concerns results that are less than certain! It's in the nature of questions that can't be answered through mathematical methods to have less than certain answers. You might notice that many of the most important questions in life fall into this category, though.