docs/philosophy/: Feedback by @brian-brazil and typos

Signed-off-by: Richard Hartmann <richih@richih.org>

content/docs/philosophy/goals.md

@@ -16,7 +16,7 @@ As a monitoring system, Prometheus is being relied upon to alert humans that
 they need to take action in order to prevent undesired system state.
 
 Thus, its most important function is to keep the pipeline of ingestion, rule
-evaluation, and alert hand-off working.
+evaluation, and alert notifications working.
 
 The second most important function is to give humans context about these alerts
 by allowing access to the most recent data Prometheus ingested
@@ -27,7 +27,7 @@ Note that this goal might result in widely different design decisions and thus
 operational patterns for different parts of our ecosystem:
 
 For Prometheus itself, this means running every instance as an island of data
-completely detached from every other instance, except for optional federation.
+completely detached from every other instance.
 
 For Alertmanager on the other hand, it means the exact opposite: meshing all
 instances closely together, sharing knowledge about alerts and their
@@ -35,13 +35,19 @@ notifications.
 
 ## Simple operation
 
-Operation of Prometheus should be as easy and failure-tolerant as possible. We
+Operation of Prometheus should be as simple and failure-tolerant as possible. We
 try to put required complexity into earlier phases, going through them less
 often and ideally still while under the control of a smaller subset of people.
 
 One example of this would be the preference of statically linked binaries over
 dynamically-built ones.
 
+## Keep dependencies clear and limited
+
+Any non-trivial system needs to integrate with other systems. To keep the
+resulting complexity low, we will always try to have the fewest interfaces
+possible and keep their resulting complexity as low as possible.
+
 ## Automation
 
 Computers are good at doing the same thing over and over again, and quickly.

content/docs/philosophy/philosophy.md

@@ -30,12 +30,12 @@ McIlroy's initial version from 1978](http://emulator.pdp-11.org.ru/misc/1978.07_
 
 ## Embrace cloud-native technologies
 
-In many ways, the cloud-native approach mirrors the Unix philosphy, updating it
+In many ways, the cloud-native approach mirrors the Unix philosophy, updating it
 for the modern world.
 
 1. Micro-services are the equivalent of doing one thing well
-2. Ubiquitous APIs enable interoperatbility in the cloud-native world
-3. Releasing early, realeasing often, and failing quickly is important when
+2. Ubiquitous APIs enable interoperability in the cloud-native world
+3. Releasing early, releasing often, and failing quickly is important when
 failure is part of expected operations
 4. Automation is key, freeing up humans to make more useful use of their time
 
@@ -54,7 +54,7 @@ charge.
 
 Prometheus is a project of convicted and passionate individuals. As we do not
 have a profit motive, nor quarterly projections, or any other requirement to
-meet arbitrary business requirements, we can foxus on getting things right. This
+meet arbitrary business requirements, we can focus on getting things right. This
 also means that we are free to suggest other implementations and projects if
 they are a better fit for a particular use-case.
 
@@ -66,4 +66,4 @@ will always strive to be welcoming to everyone.
 As an example of this, many of us are investing their personal time helping
 individuals or communities by educating and helping them to be more productive
 in the tech sector, as well as sponsoring diversity efforts, for example paying
-for travel and accomodation at [PromCon](https://promcon.io).
+for travel and accommodation at [PromCon](https://promcon.io).

content/docs/philosophy/philosophy_overview.md

@@ -3,7 +3,7 @@ title: Philosophy overview
 sort_rank: 1
 ---
 
-We have structured our considerations for developing and working with Promethues
+We have structured our considerations for developing and working with Prometheus
 into four groups in decreasing order of importance, and likelihood to change.
 
 1. Philosophy