Bernard would undoubtedly say that it was possible.
I would undoubtedly say that "that a shock is possible just by touching a live conductor while standing on the floor;
And say that the severity of the shock will vary depending on the type of floor, type of shoes ( if any ) and proximity of Earthed item to the person.
When standing on a dry carpet with bare feet the "shock" would be a mild tingle and may be so weak as to be not noticed. ( do not attempt to try that out )