Which logical fallacy is being used when attributing all network issues to the Dummox concentrator?

The logical fallacy identified in this scenario is Post Hoc, which is derived from the Latin phrase "post hoc, ergo propter hoc," meaning "after this, therefore because of this." This fallacy occurs when one assumes that because one event follows another, the first event must be the cause of the second.

In attributing all network issues specifically to the Dummox concentrator, the argument suggests a direct causation without sufficient evidence to substantiate that the concentrator is indeed the root cause of all these issues. It oversimplifies the situation by ignoring other potential factors that may contribute to network problems. This reasoning can lead to erroneous conclusions and misdirected efforts in troubleshooting or system improvement.

The other options do not apply as accurately in this context. Selected Instances would refer to cherry-picking specific examples to support a claim, which is not the primary focus here. No Technique suggests a lack of any logical argument being employed, and Composition involves assuming that what is true for part of something is also true for the whole, which does not fit the scenario of blaming a singular device for all network issues. Thus, Post Hoc is indeed the most fitting description of the fallacy at play in this scenario.