Two Tanzanian Masters students at the London School of Law were heading to the city to visit the Palace of the Queen. On the waiting station came these common London storey buses. They entered in the bus but they looked for the seating place in vain. They moved up to the driver,s sear but there was no were to seat. There conversation was as follows: Marwa: We dont have were to sit what shall we do? Chacha: Go upstairs and see if there is a free seat. Marwa went upstairs and on his return their conversation was as follows: Chacha: Is there a free seat upstairs? Marwa: Yes, upstairs is almost empty, but let us remain standing here till we reach. Chacha: But we can go upstairs and have a seat. Marwa: We cant do that because there is no driver!