The general principle that makes a piece of evidence relevant to a claim — the unstated step between them. Writing it down either confirms the argument or reveals an assumption the writer never examined, which is why the field exists.

Does it judge whether my argument is valid?

No. It checks the structure: reasons, evidence, warrants, an objection and a rebuttal. Whether the reasoning holds is a matter of logic and of what the evidence actually shows, and the tool does not attempt it.

How many reasons does an argument need?

There is no fixed number, but the tool asks for at least two before it stops prompting, because a claim resting on a single reason is usually either too broad or not yet thought through.

Why name an objection?

Because an argument that never meets its strongest counterargument is weaker for it, and naming the objection is the step that forces you to answer it. The tool asks for the objection and the rebuttal as separate fields.

Only in the tab, plus whatever you copy or download. There is no account and no upload, so an unpublished argument stays private.

Argument Mapping Tool

Claim

What the argument claims

Reasons

reason | evidence | warrant

One reason per line, with its evidence and the warrant that links themthe warrant is the step people leave out

Objection and rebuttal

The strongest objectionYour answer to it

Shape

Parts completed

2/5

2 reason(s)

With evidence

With a warrant

No objection named: the strongest counterargument is worth stating and answering.

Argument map

# Claim

_not stated_

## Reasons

### Reason 1
it blurs rest
- Evidence: two studies on recovery
- Warrant: rest needs separation from work

### Reason 2
it hides the cost
- Evidence: a survey of office use
- Warrant: the budget only shows what is bought

## Objection

_none named_

## Rebuttal

_none_

Scope and limits

The checks are structural: at least two reasons, evidence for each, a warrant for each, an objection named and answered. They say what is missing, not whether the reasoning is sound.

The tool does not judge an argument’s validity — that is the work of logic, not a text field. It lays the parts out so the gap between a reason and a claim, usually the unstated warrant, is in front of you.

The argument mapping tool lays an argument out as a claim, the reasons behind it and, for each reason, the evidence and the warrant that connects the evidence to the claim — the step writers most often leave out.

What is Argument Mapping Tool?

The argument mapping tool is built around the oldest way to find a hole in an argument: write out the step that was left unstated. It asks for a claim, the reasons that support it, and for each reason the evidence behind it and the warrant — the assumption that makes the evidence relevant to the claim. Laying those out side by side is what turns a paragraph of confident prose into an argument you can inspect, because the warrant is exactly the part a fluent paragraph tends to skip.

The warrant is worth dwelling on. Evidence rarely supports a claim on its own; the leap is a general principle that the writer usually holds without stating it. That a study found something is evidence; that the study's population resembles the reader's is a warrant, and it is often false in interesting ways. Writing the warrant down either confirms it or reveals that the argument rests on an assumption the writer never examined — which is the entire purpose of mapping an argument rather than just reading it back.

The tool checks the structure as you build it. A reason with no evidence is an assertion, not support; a reason with no warrant has left its connecting step implicit; fewer than two reasons is usually too thin to stand on; and an argument with no objection named has probably not met its strongest counter. Those are prompts about shape, and the page says plainly that they say what is missing rather than whether the reasoning is sound.

The map exports as a markdown document with a heading per reason, so it can sit beside a draft or a set of notes, and the report gathers the counts — how many reasons have evidence, how many have a warrant — with the checks. That makes revision concrete: the list of unwarranted reasons is the list of paragraphs that need another sentence, usually the sentence that explains why the evidence matters.

Nothing is uploaded and nothing is stored beyond the tab. The tool evaluates no argument's validity, which is properly the work of logic and of a reader, and it generates none of the content. It provides the slots and the structural checks, and it leaves the thinking, which is where it belongs.

Mapping an argument also makes collaboration simpler. A reader who can see the claim, the reasons and the warrants can say exactly which step they doubt — usually a warrant — instead of disagreeing with the whole piece, and the writer can answer that one step in a sentence. The same layout works as a plan before drafting: filling the slots forces the reasons to be found before the prose is written, and a claim with two warranted reasons and a named objection is most of an essay's argumentative work already done, leaving the paragraphs to do the linking and the illustration. Used recursively, the same three slots — claim, evidence, warrant — also make a paragraph's topic sentence testable, since a topic sentence is itself a claim and the sentences beneath it are expected to earn it.

How to use Argument Mapping Tool

State the claim in one sentence.
Add each reason as reason | evidence | warrant, one per line.
Name the strongest objection and your answer to it.
Read the shape checks for reasons with no evidence or no warrant.
Copy or download the map as markdown.

When to use Argument Mapping Tool vs related tools

Use the argument mapping tool when a piece of persuasive writing needs its reasoning made explicit, especially the unstated warrants between evidence and claim. When the wording rather than the structure is the concern, the Logical Fallacy Detector scans for the cue phrases of common fallacies, and when the central claim itself needs sharpening the Thesis Statement Builder assembles and checks it.

If the argument is long enough to need sections, the Outline Builder numbers the structure that will carry it.

Privacy & Security

This tool runs entirely in your browser — no data ever leaves your device. There is no server round-trip, no upload, no logging, and no account required. Your input is processed locally using client-side JavaScript and is never stored, transmitted, or accessible to anyone else. When you close the tab, everything disappears.