Yes, that could be a scenario giving rise to conflicts, ONLY IF the editor has multiple edit sessions open at the same time and editing the same feature in separate sessions. However this will lead to conflicts when he tries to Save his edits, not during a separate Reconcile process.
Versioning 101 explains this possibility:
The reconcile process can occur either implicitly or explicitly.
Implicit—A reconcile operation will occur implicitly when there are multiple editors editing the same version (see Figure 3A). Each editor maintains his or her own branch in the state tree for the duration of an edit session. When an editor attempts to save the edits in his or her edit session, a reconcile operation occurs to push the edits in the editor's branch to the branch currently referenced by the version. With multiple editors in one version, each time edits are saved, the reconcile process is executed. There is no choice of when the reconcile operation happens; it always occurs when edits are saved.
Explicit—When performing a reconcile operation between different versions (as shown in Figure 8), an editor chooses when he or she wants the reconcile process to be executed. This differs from an implicit reconcile process, which occurs when edits are saved.
