1.B Logos: Load-Bearing Reasoning (RHS-1.H)

Think of an argument as something built, not just said. The claim is the roof. The evidence is the foundation. Logos is the beam connecting them: the reasoning that explains why this evidence actually supports this claim. Pull the beam out and the roof is still floating there, unsupported, no matter how solid the foundation looks underneath it. A pile of true, relevant-sounding facts does nothing if nobody has built the beam that ties them to the conclusion.

This is why statistics alone are not logos. A number tells you that something happened. It does not tell you why it happened, or why it will happen again, or that nothing else caused it. 'Ridership rose 40 percent after the fare cut' is a fact. 'So cut the fare again' is a claim that needs two unstated beams: that the fare cut caused the rise, and that cutting it again will cause the same rise. Neither is supported, so the argument collapses the moment someone leans on it by asking 'how do you know.' Same with the streetlights: a drop in crime after lights went up says nothing about every other thing that changed that year, like policing, weather, or a closed factory nearby.

This sits right next to the question of what counts as common ground and what diction does to an audience, because an audience that distrusts weak logos starts reading every other appeal with suspicion too. A writer who wants ethos and pathos to land still has to build the logical beam first, or the whole structure reads as manipulation rather than persuasion.