"Can't Be Sure" is the debut single by British indie pop group the Sundays.

[1][2] It was the first (and in the United Kingdom, only) single to be released from their album Reading, Writing and Arithmetic, which was released a year later.

The B-side was "I Kicked a Boy", which also appeared on the album.

The 12" single contained an additional, non-album track, "Don't Tell Your Mother".

[3] The song's lyrical theme is "desire", treated as a general concept rather than being directed towards anything or anyone in particular.