Lydia McGrew: The Gospels are more reliable than you think

Yes, and the case is stronger than most people realize. New Testament scholar Lydia McGrew argues that the Gospels are the work of authors who were close to the events, always trying to get the facts right, and highly successful at it. She calls this the “reportage model,” and the evidence behind it is the kind of thing most Christians were never taught to look for.

That gap matters. Plenty of believers grew up being told to trust the Bible without ever being shown why they should, and trust without evidence leaves people exposed when serious challenges to the faith show up. In this episode of Faith Lab, we sat down with Lydia to find out what the historical case actually looks like.

The problem with “just believe it”

Before Lydia got into the evidence, she wanted to name something that gets in the way: presuppositionalism. It’s an approach to Christian apologetics, popular in Reformed circles, that says you have to start by assuming God exists and the Bible is true before any argument can get off the ground. The slogan runs something like, “If you don’t start with God, you won’t end with God.”

Lydia is an evidentialist, and she thinks that approach is circular. During our conversation, Shelby Hanson put the difference plainly: “Would a presuppositionalist view essentially be you kind of have to believe it in order for it to make sense? And then an evidentialist would say it can make sense before you believe.” Lydia confirmed it. The evidence should stand on its own terms, and anyone willing to look at it honestly should be able to see its force.

That distinction shapes everything that follows. If the Gospels can only be trusted by people who already believe them, the case is circular. If the evidence holds up on its own, the conversation changes.

What “reliable” actually means

One of the most important moves Lydia makes is defining the word. A lot of people hear “reliable” and picture something loose: the authors got the gist right, give or take some careless details. Lydia calls that the “bean counting” version of reliability, where you expect a scattering of mistakes and hope most of it is true.

She’s after something much stronger, what she calls “high reliability,” or the reportage model. On this view the Gospel authors were eyewitnesses or people who knew eyewitnesses directly, and they were conscientious about what they wrote down.

“They’re always trying to get it literally right, and they’re very highly successful. So they’re never deliberately changing any facts.”

That is different from strict inerrancy. On the reportage model, the authors could make occasional good-faith errors, the kind any honest, careful person might make from a memory slip or a minor misunderstanding. But they were never inventing material, never rearranging events for theological effect, and never putting words in Jesus’ mouth. Think of someone you deeply respect for their honesty and care with facts. That is the kind of reliability Lydia is describing.

“He’s not infallible, but he’s really pretty good. You’d say, wow, this person, if he makes a mistake, it’s gonna be an understandable mistake.”

Two kinds of evidence

Lydia describes the case for Gospel reliability as a massive cumulative one, with “categories within categories within categories.” At the broadest level, it splits in two.

External evidence compares what the Gospels say to things you can verify independently: geography, customs of the time, name statistics from burial inscriptions and other records. Scholars like Richard Bauckham have shown that the Gospels reflect the actual popularity patterns of Jewish names in first-century Palestine, patterns that later fiction writers could not replicate even when they tried. Place names, political titles, cultural details: the Gospels consistently match what we know from outside sources.

Internal evidence works differently. Instead of checking the Gospels against external facts, you compare them to each other and ask whether they show the marks of honest testimony. This is where Lydia’s signature argument comes in.

Undesigned coincidences

An undesigned coincidence is a subtle, puzzle-like fit between two texts that neither author seems to be trying to create. The fit is casual enough that it could easily be overlooked, which is exactly why it matters. Anyone fabricating the connection would be wasting effort on something readers might never notice.

Lydia’s book Hidden in Plain View is built around dozens of these. One of the clearest examples involves the Last Supper. In Luke’s account, the disciples are arguing about who is the greatest, and Jesus responds: “Who is greater, the one who reclines at the table or the one who serves? Is it not the one who reclines? But I am among you as the one who serves.” The odd part is that Luke has just said Jesus himself is reclining at the table. So what does he mean, “I am among you as the one who serves”?

Luke never explains it. John does. John’s Gospel doesn’t record the argument or the speech, but it does record that after supper, Jesus got up, took off his outer garment, wrapped a towel around himself, and washed his disciples’ feet. The foot washing in John explains the otherwise puzzling statement in Luke, and neither author appears to be coordinating with the other. The fit is incidental, and it points to truth.

Another example comes from the feeding of the five thousand. Mark’s account mentions that the crowd sat down on “green grass,” specifying the color without explanation. John’s account never mentions the color of the grass, but it does note that the feast of Passover was near. In that region, Passover falls during the season when grass would be green, before the summer heat turns everything brown. Mark gives the detail. John gives the time frame that explains it. Neither seems to be connecting the two.

“An incidental interlocking that points to truth. There’s your concise phrase.”

No single example carries the weight here. What makes these coincidences powerful is the sheer volume of them across the Gospels and Acts, a cumulative case that becomes very difficult to explain if the authors were inventing stories or working from unreliable sources.

Why this matters

If Lydia is right, the Gospels are far more than inspirational texts that happen to contain some historical information. They are the product of honest, careful, eyewitness-rooted reporting, and that changes how you read them, how you defend them, and what foundation your faith actually stands on.

For Christians who were taught to trust the Bible on authority alone, this kind of evidence doesn’t replace faith. It grounds it. And for anyone who has felt the weight of skeptical objections without knowing how to respond, the cumulative case Lydia lays out is worth understanding.

In part two, we move from the Gospels into Acts and Paul’s letters, where Lydia thinks the evidence gets even harder to brush aside. For a deeper dive into undesigned coincidences, Hidden in Plain View is the best starting point, and Peter J. Williams’ Can We Trust the Gospels? is a shorter, accessible companion on the external evidence.

Common questions

What is the reportage model of Gospel reliability?

It’s Lydia McGrew’s term for the view that the Gospel authors were eyewitnesses or knew eyewitnesses directly, were always trying to get the facts literally right, and were highly successful at it. They could make the occasional good-faith error, but they never invented material or changed facts deliberately.

Are undesigned coincidences good evidence for the Gospels?

An undesigned coincidence is an incidental fit between two accounts that neither author seems to have engineered, like the foot washing in John explaining Jesus’ “one who serves” statement in Luke. One example proves little on its own, but dozens of them across the Gospels and Acts become very difficult to explain if the authors were inventing stories.

Is the reportage model the same as biblical inerrancy?

No. Strict inerrancy allows no errors at all, while the reportage model allows occasional honest mistakes, the kind that come from a memory slip or a minor misunderstanding. What it rules out is inventing material, rearranging events for theological effect, or putting words in Jesus’ mouth.

What external evidence supports the Gospels?

The Gospels consistently match what we know from outside sources on geography, customs, and political titles. Richard Bauckham has shown they also reflect the actual popularity patterns of Jewish names in first-century Palestine, patterns that later fiction writers could not replicate even when they tried.