“Spy” is an ambiguous term, sometimes meaning “intelligence officer” and sometimes meaning “informant”. Most ‘spies’ in the “people committing espionage” sense are untrained civilians who have chosen to pass information to officers of a foreign country, for varying reasons. They are regular criminals who may be good or bad at crime. So if you see someone acting suspicious, an argument like “well surely a real spy would have been coached not to do that during spy school” is at least locally invalid.
“Spy” is an ambiguous term, sometimes meaning “intelligence officer” and sometimes meaning “informant”. Most ‘spies’ in the “people committing espionage” sense are untrained civilians who have chosen to pass information to officers of a foreign country, for varying reasons. They are regular criminals who may be good or bad at crime. So if you see someone acting suspicious, an argument like “well surely a real spy would have been coached not to do that during spy school” is at least locally invalid.