Is it possible that someone did not actually view my campaign even though a unique view was recorded?

A view is triggered and tracked when a tiny image in the HTML version of the email campaign is downloaded from our servers. 

If someone else had access to the recipient's email (e.g. administrator, email administrator), they could trigger a view even if the actual recipient did not view the campaign.

Or if the recipient is using a preview pane to read emails, a view could be recorded if they are scrolling through or over emails.

Also an inferred view (indicated by a red asterisk in Reports) is a special type of unique view that is recorded when a recipient has images disabled or blocked (meaning a unique view was not initially recorded when they opened the email) but the recipient takes an action with the campaign such as clicks a link, downloads a file or opts out. In these cases, the system inferred that in order to click, download or opt out, the recipient had to view the campaign - so in addition to recording the specific action(s) taken by the recipient, a unique view is also recorded.