This study tests the recognition of errors in context and whether the presence of errors affects the reader's perception of the writer's ethos. In an experimental, posttest only design, participants were randomly assigned a memo to read in an online survey: one version with errors and one version without. Of the six intentional errors in version one, on average, readers only noticed two errors, which suggests that readers notice some but not all errors. The ethos ranking for the writer was also statistically significant between the two versions, suggesting that the presence of errors can affect the writer's ethos.