What’s the biggest difference Heidegger and Wittgenstein? @Banno this is basically Wittgenstein:
"Yet one must not fail to notice that we use the term "Dasein-with" to designate that Being for which the Others who are are freed within-the-world. This Dasein-with of the Others is disclosed within-the-world for a Dasein, and so too for those who are Daseins with us, only because Dasein in itself is essentially Being-with. The phenomenological assertion that "Dasein is essentially Being-with" has an existential-ontological meaning. It does not seek to establish ontically that factically I am not present-at-hand alone, and that Others of my kind occur. If this were what is meant by the proposition that Dasein's Being-in-the-world is essentially constituted by Being-with, then Being-with would not be an existential attribute which Dasein, of its own accord, has coming to it from its own kind of Being. It would rather be something which turns up in every case by reason of the occurrence of Others. Being-with is an existential characteristic of Dasein even when factically no Other is present-at hand or perceived. Even Dasein's Being-alone is Being-with in the world. The Other can be missing only in and for a Being-with. Being-alone is a deficient mode of Being-with; its very possibility is the proof of this. On the other hand, factical Being-alone is not obviated by the occurrence of a second example of a human being 'beside' me, or by ten such examples.
Even if these and more are present-at-hand, Dasein can still be alone. So Being-with and the facticity of Being with one another are not based on the occurrence together of several 'subjects'. Yet Being-alone 'among' many does not mean that with regard to their Being they are merely present-at-hand there alongside us. Even in our Being 'among them' they are there with us ; their Dasein-with is encountered in a mode in which they are indifferent and alien. Being missing and 'Being away' are modes of Dasein-with, and are possible only because Dasein as Being-with lets the Dasein of Others be encountered in its world. Being-with is in every case a characteristic of one's own Dasein; Dasein-with characterizes the Dasein of Others to the extent that it is freed by its world for a Being-with. Only so far as one's own Dasein has the essential structure of Being-with, is it Dasein-with as encounterable for Others."
The
Philosophical Investigations by any other name. It's even got the bit about engines running in idle and the form-of-life. Practically indistinguishable. I know you are wont to agree.