Two mariners are shipwrecked on a remote Island. After a while, the first shipwrecked mariner turns to the second shipwrecked mariner and says
“Here, take this improvised axe made of stone, chop down that last remaining tree over there, then light a fire to send smoke signals - I’ll keep a
good look out on the off chance that another ship happens to be passing by”. That might be humorous if it were not UK Defence Policy post SDSR.